note: This report was
written in the second half of 2007, with updates made
regularly until April 2008. We continue to hear of very
small numbers of cases but fortunately, owing to the
positive efforts of most of the companies whose products
were involved, lamps causing these problems are being
steadily replaced by re-formulated products which don't
emit abnormally short-wavelength UVB radiation. (See
later for an explanation of this.) However there
are still small numbers of "old stock" of
certain products on sale in some areas, and there is
always the possibility that a new untested product may
be introduced and found to cause problems. This section
of the website will shortly be revised to bring it fully
up to date; but this report is still valid today - September
small but increasing number of pet reptiles are developing
symptoms of photo-kerato-conjunctivitis as a result of abnormal
exposure to ultraviolet radiation. We have now heard reports
of more than 80 reptiles which have been affected in the
last year. We have documented 40 cases associated with the
use of compact lamps from the ZooMed Reptisun range; five
more incidents involving at least another 40 animals have
now been reported to us, associated with the use of fluorescent
tubes in the new R-Zilla Desert 50 Series. When the problem
was recognised in time and the lamp removed, all affected
animals recovered; however three deaths have been reported
under ZooMed compact lamps and two associated with an R-Zilla
tested samples of fluorescent lamps from each brand which
has been alleged to have caused photo-kerato-conjunctivitis
in reptiles, and compared the test results with those from
UVB meters did not prove very helpful in determining the
cause of the problem; they indicated that at the distances
at which problems occurred, the total UVB (in microwatts
per square centimetre) from these lamps was no higher than
that found in natural sunlight. However, total UVB measurements
give little indication of the photobiological activity of
of the UV Index (which does provide a measure of this) revealed
that whereas 100 µW/cm² total UVB from sunlight was recorded
as yielding a UV Index of 1.6 – 2.0, these lamps were producing
emissions in which 100µW/cm² total UVB yielded a UV Index
of between 8.9 and 14.2. Light
from these lamps would therefore appear to be between four
and eight times as photobiologically active as light from
the sun. At close range these lamps were all
producing hazardous levels of UVB.
indicated that all these lamps utilise a distinctive phosphor
of a type used in lamps for testing the deterioration under
UVB of resistant materials such as roofing and car bodywork,
and in older-style human clinical phototherapy lamps (so-called
"FS" lamps). The lamps
we tested from three different brands generate low wavelength
UVB, some from as low as 275 - 280nm, whereas the lower
limit of UVB in natural sunlight is 290-295nm.
(The phosphor used in many other brands of reptile
UVB lamps is of a type used in some human tanning lamps,
which mimics the UV in sunlight and produces no UVB at wavelengths
As well as a much higher proportion of more
damaging non-solar UV energy at wavelengths below 295 nm,
the lamps with the problem phosphor proved to have a higher
total UVB output than most other brands of fluorescent
reptile UVB lamps. Because much of this is in the more photobiologically
active wavelengths, the risk of reaching a threshold dose
for photo-kerato-conjunctivitis, and possibly other forms
of UV radiation damage, is much greater than with other
combination of other factors
apparently increased the risk of photo-kerato-conjunctivitis
with these lamps even further:
In some cases, product literature did not give adequate
information. It is essential that lamps are not sold without
clear recommendations regarding suitable basking distances
and the hazards of over-exposure. Many reptile keepers
are unaware that there are any risks associated with close
contact with a fluorescent UVB source. The history of
fluorescent UVB lamps is such that they are often perceived
as "weak" sources of UVB and keepers are often advised
to position them close to the reptile.
When placed in aluminium reflectors, in some cases UVB
beneath compact lamps was increased by more than 700%.
The extreme increase in UVB underneath aluminium reflector
domes has not been widely known, or the hazard recognised,
either by manufacturers or hobbyists.
Most of the lamps have a low visible light output. They
are therefore less likely to induce an aversive reaction,
or pupillary constriction, when in the reptiles' line
of sight. They do not "look like" very intense, direct
Most of the UVA output of these lamps is not in the visible
UVA range for reptiles, since the threshold for vision
is about 350nm. This reduces even further the visual impact
of the lamp to the reptile.
Fluorescent lamps produce a small amount of heat. This
is insufficient to deter a reptile from a close approach,
and in fact the gentle warmth may even prove an attraction.
Broadband UVB meters such as the Solarmeter 6.2 provide
only readings of the total UVB in microwatts per square
centimetre. This gives little indication of the photobiological
activity of the UVB radiation from this type of lamp.
Misleading comparisons of lamp and solar readings taken
with these meters may be made, possibly leading to incorrect
placement of the lamp, if this is not understood.
believe the use of a “phototherapy” phosphor in these lamps
is a cause for concern. The effects of long-term exposure
to non-solar wavelengths on reptiles is unknown, but these
wavelengths are far more damaging to living cells than solar
FS lamps have been used widely in research upon cell damage
and immunosuppression, and to induce skin tumours in laboratory
animals. FS lamps have been used in at least two studies
with reptiles which suffered unexpected detrimental effects
apparently related to their UV exposure, including photo-kerato-conjunctivitis,
depression and death, and skin tumours. Although the compact
lamps we tested from ZooMed, and the T5 and T8 tube we tested
from R-Zilla are not FS lamps, they do appear to contain
the same phosphor. The Big Apple Herpetological Mystic tube
and compact lamp we tested, however, have spectra very similar
indeed to FS lamps.
update: 23rd September 2009- Click
here to go straight to this update
very pleased to be in contact with the companies selling
the lamps featured in this report. As they keep us informed
of their progress in addressing these issues, we will keep
you informed by publishing their responses in this section.
reports were sent to Zoo Med Laboratories, Inc. in California,
USA, and Big Apple Herpetological, Inc. in New York, USA
on 21st September 2007 and to Central Garden and Pet Company
- Aquatics (R-Zilla products) in Wisconsin, USA on 23rd
now received positive responses from all three companies.
These are published below in the order in which we received
and encouraging response was received from Shane Bagnall,
Zoo Med Laboratories, Inc. Research & Development Division,
on 25th September. His email, written to FB, is published
here in its entirety:
try to keep abreast of any and all UVB research relating
to reptiles, I am familiar with your website and I
have read the series of articles published by yourself
and your colleagues in the magazine; “Reptile Care”
magazine. I am impressed by your work and am grateful
for the help and information that you offer to the
herpetocultural community. It is unfortunate that
our first communication is under these circumstances.
Let me assure you that our first concern is for the
health of the animals for which our products are being
used. I have read the report that was attached in
your email and would like to address the related issues.
know, we recently started including instructions in
the packages with all of our ReptiSun CFL’s. This
was initiated when we received a report from a chameleon
keeper in the US of swollen eyes caused by a Reptisun
10.0 CFL. After investigation it was found that the
lamp was situated horizontally above the cage directly
above the screen mesh. Plants placed in the cage allowed
the chameleons to get within just a couple of inches
from the surface of the lamp. This prompted me to
develop instruction sheets that would prevent this
from happening again if followed correctly. Lamps
were measured in a variety of fixtures and domes.
The distances published in the instruction sheet were
intended to provide 15-30 µW/cm2 at the basking site.
As you mentioned below, the values seemed to be conservative.
Unfortunately, it was later found that the Zoo Med
(Solartech) meter used for measuring lamps was giving
false high UVB readings. Apparently there was a batch
having problematic sensors leading to false high readings.
Following this discovery, we requested that Steve
Macken notify the UVB group of this so that the meters
could be recalibrated. We intend on rewriting the
instructions and welcome your input on this process.
analysis of the various phosphors used in reptile
UVB lamps was very intriguing. We were unaware of
the potential for harm due to the FS phosphor associated
with the ReptiSun 10.0 Compact Fluorescent lamp, as
these phosphors were used in older models of our lamps
without reports of eye damage. In your report, you
described the differences between the “new” and “old”
style ReptiSun CFL’s. When we made this change, it
was based on the current body of information available
at that time on the UVB requirements of reptiles.
This information came from published scientific literature,
our own experience with reptile lighting, and even
information published by yourself and your colleagues.
The old style ReptiSun 5.0 CFL depreciated (decayed)
to a level below 15 µW/cm2 at a distance of 12 inches,
which we felt was too low for adequate photobiosynthesis
in reptiles. The old 10.0 CFL was stronger than the
5.0 CFL, but not as strong as our ReptiSun 10.0 linear
fluorescent. We produced a series of prototypes with
higher levels of UVB that we felt were safe and effective
based on the information available at that time. We
also tested the lamps in house and with the animals
at Zoo Med. We did not observe any cases of photo-kerato-conjunctivitis
in any of the animals.
note that we will be taking the following actions
to prevent further cases of photo-kerato-conjunctivitis
the instructions to address the recommendations
made in your report.
the lamps during production for 100-150 hours for
the following reasons:
the initial UVB output of the lamp when first used
by the consumer.
the consumer from having to make allowances for
rapid initial depreciation.
the packaging to address issues relating to proper
use of the lamps and the issues relating to percentages.
begin working on new prototypes using phosphors
similar to those found in our linear fluorescent
are interested in working with us, we would like to
send proofs of instructions and packaging artwork
to you for review prior to publication/printing. In
addition, we will send samples of prototype lamps
to you for review when they become available.
Research & Development Division
3650 Sacramento Drive, San Luis Obispo, CA 93401
Ed's note- FB is a qualified veterinary surgeon and
although in the UK this does not give the title Dr.,
in most countries, it does)
Thomas Lutz, Director of Research and Development for Central-Aquatics
(R-Zilla products) had already contacted FB once he learned
of our research, and had previously expressed the company's
commitment to address the problem. In an email sent on 19th
September he had written (extract):
I am very
happy to be working with you to not only remedy the
apparent issues which you’ve recently uncovered, but
also in moving forward in our target of producing
the best product for animal health. I can tell you
that this is my number one priority and one which
I am working feverishly to provide the right answers
of action is to review the information that you’ve
provided, coupled with discussions with our suppliers,
and other vendors and over the next 24-72 hours continue
to work to develop what we feel is the best course
of action. We will duly develop a “formal” statement,
and as soon as we reach this point, I will share what
I can with you.
Central Garden & Pet -- Aquatics
West Oakwood Park Drive, Franklin, WI 53132
September FB received another email from Dr. Lutz in
which he acknowledges receipt of the report and writes (quote)
so much for your very insightful report and information.
We are currently reviewing all of the information and
hope to make an informed decision very soon.
26th September FB received the following email from
Dr. Lutz, posted here in its entirety, making the formal
statement that R-Zilla are withdrawing all the Desert 50
Series lamps from sale immediately.
you kindly for your in depth and extremely informative
report(s). Your recent findings and revelations around
some of the phosphors used to produce the UVB light
required for proper animal wellness and health have
raised the industries awareness and understanding
to a whole new level.
Service department had just recently received a limited
number of reports of photo-kerato-conjunctivitis thought
to be linked to use of our Desert 50 lights, but we
were baffled by these claims as the total UVB output
was in line with what the hobby and industry thought
to be necessary for proper animal health. As is well
documented in yours as well as others reports, we
know that UVB is a necessary evil in that it is required
for animal health (Vitamin D production), but bad
if overexposure occurs (photo-kerato-conjunctivitis).
We pride ourselves in producing the best products
for the Animal and Consumer, and believed that because
our new Desert 50 bulbs were finally giving the output
necessary for proper animal health compared to what
has traditionally been on the market, that this was
an issue of the market adjusting to the correct levels
of UVB output.
the 50 ìm/cm2 UVB output of our lamps is correct,
the very low wavelength UVB is causing an accelerated
impact on the animals which increases the likelihood
of UVB overdose and consequently photo-kerato-conjunctivitis.
We understand that this wavelength is truly UVB (and
not UVC), and that if caught early enough the hallmark
side effects of photo-kerato-conjunctivitis are completely
reversible. As we hold Animal health in the utmost
regard, and consider the ability to overdose to be
too high, we have therefore elected to stop all sales
of the Desert 50 bulbs that contain high levels of
the “bad” phosphor(s) and are actively reformulating
the phosphor blend to yield the best UVA/UVB/visible
issuing an “Advisory Notice” to our customers and
general end users advising of the concerns surrounding
these lamps. We know that if left on the market, most
of the units would be used without issue for a number
intensity significantly decreases after an initial
burn in period (120 hours+),
UVB experienced by the animal varies with habitat
set-up (screen usage, distance of light from animal,
variability in exposure time (as low as 1 hour up
to as high as 16 hours)
the variability in set-up and use is too high to feel
comfortable continuing to sell these bulbs and risk
animal safety without reformulation of the phosphor.
As noted, we have stopped all sales and distribution
of the concerned Desert 50 lamps, and advising that
if consumers are using the lamps without effects characteristic
of photo-kerato-conjunctivitis to continue to use
them at their own discretion OR return for a complete
refund. We leave this to the discretion of the consumer,
but if signs of photo-kerato-conjunctivitis present,
the animal should be removed from the UV exposure
and allowed to recover. If the lamp is continued to
be used after recovery, a reduced photo period and/or
larger distance between the light and animal should
course of action is as follows: We are issuing an
“Advisory Notice” and have stopped distribution of
all Desert 50 lamps of concern, in addition to allowing
full customer returns at the customers’ discretion.
In doing so, we will be out of stock on a number of
the affected Desert 50 bulbs until a lamp with the
correct phosphor ratio and make-up is produced. In
addition, we are reformulating our phosphor blend
to give the correct spectral distribution (as just
recently uncovered by your efforts). We will continue
to strive for the perfect UVB lamp for the reptile
hobby and hope all Zilla™ users will be supportive
and understanding as we strive for this goal.
Lutz, Ph.D. R&D Director
Garden & Pet -- Aquatics
5401 West Oakwood Park Drive, Franklin, WI 53132
there is no indication of any problem with the R-Zilla Desert
50 lamps in the main display sections or on the news page
on their website
yet, Central-Aquatics (R-Zilla products) have now uploaded
the following Advisory Notice, which may be accessed by
a link alongside the description of the Desert 50 lamps
in their Products section, at the following URL:
Aquatics™, in the interest of delivering the best
possible products to the reptile hobby completes on-going
“Quality Control” tests of our products.
QC check by our R&D Labs on the Zilla™ Desert 50 bulb
has indicated a potential issue with the “phosphor”
coating of the Zilla™ Desert 50 Bulb. The phosphor
coating is a complex chemical matrix which is utilized
to yield the unique characteristic of any fluorescent
bulb. In the case of the Zilla™ Desert 50 Series,
one of the chemical elements present produces a low-wavelength
UVB fluorescent emission. While still in the UVB emission
range (280-320 nm), the effective influence of the
low wavelength light is more significant than that
of higher UVB constituents (those near 320 nm). As
is well known, over exposure of UVB light can cause
photo-kerato-conjunctivitis in certain species of
reptiles-primarily turtles and lizards. The Zilla™
Desert 50 bulb contains UVB light which is required
for animal health; however, if not properly used,
harmful overexposure may occur. The very low-wavelength
UVB light is most pronounced during the first 120
hours of use.
on these findings we are reformulating the “phosphor”
coating of the Zilla™ Desert 50 bulbs to reduce overexposure
risk. Until these reformulated bulbs are available
we will be out of stock on the items listed below.
the new Zilla™ Desert 50 products are in your store,
we would recommend that you stop selling the sku’s
listed below and return the product to your distributor
or your Central Aquatics™ Sales Representative for
credit. Central Aquatics™ will also replace products
that have already been sold that contain the effected
follows a contact telephone number for enquiries,
and a list of all the Desert 50 series lamps with
their product and catalogue reference numbers, for
stockists to check out.
are a reptile keeper who has purchased one of these lamps,
we suggest that you return it to the store where you bought
it, and obtain a refund. This Advisory Note implies that
the store will be able to obtain credit from Central Aquatics
for lamps which they return to the company.
10th FB received the following very positive response
from Steven Spitz, Big Apple Herpetological, Inc., stating
that they are withdrawing all the "Mystic" series
of lamps from sale.
for the delay in our response to your email. The documentation
and research information that you provided was both
extensive and impressive. It did take us some time
to digest the report as well as your final analysis
on the Mystic Fluorescent Bulbs. However, before I
continue on this subject I would like to commend you
for your dedication to lighting research - perhaps
one of the most important aspects of reptile care.
launching Mystic Bulbs we ran extensive long term
testing on various reptiles which included consistent
analysis of UV at varying distances. The reptiles
used during our testing procedures were carefully
monitored and the results of all of our testing were
incredibly positive. Mystic Bulbs have been on the
market for several years and we consistently received
positive feedback. However, there was a case reported
to us where a customer used the Mystic Bulb in a small
white cage at close distance to their baby Bearded
Dragon causing what they referred to as swollen eyes.
report prompted us to develop bright colored stickers
which were adhered to the base of the bulbs indicating
minimum distances that the bulb should be placed from
the reptile. Since this time we have found the Mystic
Bulb to perform well for our customers but we were
completely unaware of the potential harm that FS phosphors
could cause. In fact, prior to your report we were
unaware that FS phosphors were in the Mystic Bulbs.
reason for the existence of Big Apple Pet Supply is
to offer safe and superior care products to the pet
industry. If there is even a remote chance that the
Mystic Bulbs can cause harm to any reptile or animal
we cannot and will not continue to sell them. We feel
that your research has substantial merit and have
responded by pulling the bulbs from our website and
destroying our remaining inventory.
now in the process of completely redesigning our reptile
lighting. As soon as new samples are available we
will provide them to you for review.
thank you for helping all of us in the pet industry
continue to strive towards bringing safer and increasingly
higher quality products to both our customers and
Pet Supply - http://www.BigApplePetSupply.com
Big Apple is a registered trademark of Big Apple Herpetological,
Inc., all rights reserved.
Big Apple Pet Supply - a division of Big Apple Herpetological,
6th November 2007
do not appear to have publicised any information, yet, about
the perceived hazard from their compact lamps. However,
on 31st October FB received an update on ZooMed's
progress. Shane Bagnall, Zoo Med Laboratories, Inc. Research
& Development Division wrote:
I do have
good news to report. As stated earlier, our compact
fluorescent lamps are being pre-burned to reduce the
initial UVB output. They are being pre-burned for
168 hours to carry them through the “burn-in” period
and reduce the initial UVB output as experienced by
the consumer. This also reduces the difficulty associated
with using the lamps as there will no longer be a
need for separate instructions for the burn-in period
and the remainder of the life of the lamp. With this
in mind, we will be working on new instructions soon.
received our first reformulated phosphor blend on
Tuesday, October 30th. We will be producing new sample
CFL’s using this phosphor and will forward some to
you for testing as soon as they are finished. These
samples will not be pre-burned so that we can analyze
UVB decay as well as the lamp spectrum ...............
(there followed some details of the spectral analysis;
also details of a new dome reflector, samples of which
we will also be sent.)
concern is for the health of the animals.
Customers that have experienced problems should contact
Zoo Med directly for a replacement or a refund.
Please visit www.zoomed.com
(USA) or www.zoomed.eu
(Europe) for contact information.
Zoo Med Laboratories, Inc. Research & Development
3650 Sacramento Drive, San Luis Obispo, CA 93401
are indeed providing a very helpful response to those whose
reptiles have suffered following exposure to the lamps.
We have been informed by several customers that they have
been immediately offered a refund or exchange, after they
contacted ZooMed personally. We have also heard from one
customer for whom ZooMed paid for the veterinary treatment
which was given to her turtle.
JV (full name and address supplied) was so impressed
with ZooMed's response, she sent us full details. The story
began when on October 3rd, she sent the following letter
Wednesday, October 03, 2007 5:19 PM
Subject: CFL UV bulbs
A few months ago, I purchased several of your bulbs
for my bearded dragon and turtles. I bought 3 of the
ReptiSun 10.0 strip bulbs and a ReptiSun 10.0 CFL.
As a member of the Chicago Herp. Society, I had read
the reports of how great your bulbs are and have used
them in the past with good results.
bulb was installed in the tank of a baby map turtle.
Two days later, we noticed one eye was very puffy.
Suspecting an infection, we took him to the vet. The
vet proceeded to give him Baytril shots over the course
of the next week. However, in the meantime, I removed
the CFL, thinking perhaps it was irritating the eye
Within days of removing the light, his eye cleared
replaced the light. Again, within days the eye became
swollen and the turtle was listless.
We went back to the vet for another round of Baytril.
Again, I removed the light, waiting a few more days.
Again, the eye cleared up within 2 days after removing
the bulb, regardless of when he had started the round
the second round of shots, I replaced the bulb again.
When, after a day, his eye appeared to be getting
worse, I removed the bulb for good. We have had no
further problems since then, and I chalked it up to
having too strong a UV bulb for the little guy.
see this publication: http://www.uvguide.co.uk/phototherapyphosphor.htm
These are exactly the symptoms displayed by my turtle
while using your CFL bulb. Each time, he did not improve
until after I removed the bulb from his tank.
I can't believe that a company as well respected in
the reptile world as ZooMed would put out a product
this dangerous to our pets. Had I not listened to
my suspicions and left that bulb in place, there's
no telling what would have happened to my little guy.
forward, I expect a full refund of the price I paid
for this bulb ($20) and we can also discuss compensation
for my vet bills, which totaled almost $200. I would
appreciate a response either by email or phone.
then gave ZooMed her contact details.
She was surprised to receive a telephone call within
48 hours; in the email she wrote to us, she said:
a call from ZooMed ...... They will be sending me
a replacement strip Reptisun 10.0 and as soon as I
can mail them copies of my vet bills, they will be
cutting me a check for those, as well.
Absolutely unbelievable. I expected to have to fight
them on this, but it was like they couldn't do enough
I can't believe I'm saying this, but what a fantastic
company-- totally stepping up to the plate, admitting
their errors, and compensating people. In this world,
this is a rare thing.
received a Reptisun 10.0 linear tube on 15th October.
On 2nd November she wrote to us again to say:
to give you an update, today I received a check from
ZooMed IN FULL for my vet bills. It was a total of
$169.40 (US). What a wonderful company. You can bet
that I will be dealing with their products in the
future......... Hopefully, they'll be pulling this
product from their offerings soon.
baby map turtle is now fully recovered, too, and doing
very grateful that the responses to our reports are so positive,
and that these companies are verifying our results and working
very hard to remedy the situation so swiftly.
thank them for their concern and wish them every success
in their research. We
will of course report on any new developments as they occur.
20 April 2008
April we received reports from two different parts of the
USA, describing new cases of photo-kerato-conjunctivitis
in reptiles under R-Zilla Desert 50 series lamps. Since
their production and distribution stopped at the end of
September 2007, we believe these cases were the result of
the purchase of old stock found in stores who chose not
to return the lamps to R-Zilla for a refund. We sincerely
hope that all these lamps will be removed from circulation
as soon as possible, as they still represent a hazard.
that a new phosphor formulation was under development, FB
contacted Dr. Lutz, Director of Research and Development
for Central Garden and Pet -Aquatics (R-Zilla products)
to advise him of the new cases and ask after the progress
of the new product development. He telephoned FB on 9th
April. He gave a detailed update on the situation with regard
to R-Zilla and ESU Reptile products, all now under the management
of the Central Garden and Pet Company.
Lutz told her that R-Zilla
Desert 50 Series lamps
of all types are now going into production again, with a
new phosphor blend and new specifications. Lamps should
begin to arrive from the factory towards the middle to end
of May, and appear throughout the USA during May and June
to Dr. Lutz, the new Desert 50 series lamps will have no
significant UVB output below 300nm, to reduce the risk of
any problems associated with non-terrestrial UVB, yet the
specifications are for high levels of UVB from 300nm to
320nm, providing a useful, but not excessive, maximum UV
Index of 6.0 at the minimum recommended basking distances.
He will be sending a set of these new lamps to UV Guide
UK so we will hopefully have test results for these, this
he said that minimal lamps of the new type will be available
before the dates mentioned, so if any Desert 50 lamps are
found in stores at the moment, these are likely to be old
stock and may be returned to R-Zilla for a full refund if
requested. Although most stocks are now gone from circulation,
a few lamps may still be found.
new lamps will not be in new packaging, although longer-term
plans do allow for this.
are still selling their Tropical
25 Series lamps
which have never been subject to recall.
Although we have not heard of any reports of problems caused
by these lamps, they do contain lower quantities of the
same phosphor as the old Desert 50 lamps, hence they too
are being replaced in due course with a version of the new
phosphor blend. Dr. Lutz said that once the Desert 50 Series
were established, there would be a transitional period over
the summer of 2008 during which new stocks of the Tropical
25 lamps with the new phosphor blend would arrive, to replace
the older version.
then asked about the status of the
many variations of which are still on sale at outlets throughout
the USA. The ESU Desert 7% Lamp and the Super UV Daylight
3% UVB Lamp are still widely available, as are ESU Slimline
Reptile Fixtures and ESU Birdlife Avian Lamps.
these are still being produced for Central Garden and Pet,
and will remain on sale at the present time under the ESU
brand name, although for how long, Dr. Lutz did not specify.
Here at UV Guide UK we have recently tested one sample of
Desert 7% Lamp
(linear tube) and one ESU
Super UV Coil Lamp,
Birdlife Avian Lamps
found one of the Avian Lamps had an extremely high UVB output
and closely resembled a Desert 50 Series tube, whereas the
other three and the ESU Desert 7% had only very low UVB
output. The ESU Super UV Coil Lamp had an even lower output
Lutz said that when, back in September, they were alerted
to the problem with the Desert 50 lamps, they had performed
Quality Control tests on ESU stock as well, and found all
the batches they tested had a low UVB output.
transparent "protective lens" cover on the ESU Slimline
has long been known to block UVB,
and must be removed if the lamp is to provide any UVB to
the reptile. We recently obtained a new sample and our tests
confirmed this; it blocked 100% of the UVB from even the
most powerful UVB tube we placed in the Fixture.
Dr. Lutz assured FB that this too was something they were
working on and in fact, a new acrylic cover for this fixture
is already in production and some new stocks already have
this UV-transmitting plastic; the old type is being phased
out. He has promised to send us a sample of this new cover,
reminded Dr. Lutz that we are still hearing occasional reports
of problems experienced by users of Desert 50 Series Lamps
which are still on sale in a few areas. Dr. Lutz would remind
customers that if they contact R-Zilla directly or through
their stockist, any concern over a particular lamp will
be dealt with promptly and sympathetically.
Update: 23 September 2009
been a long time coming, but we are at last able to
announce that we have received and completed all tests
on a wide range of new, re-formulated Zilla products
and we have received, and are in the process of testing,
the new, re-formulated ZooMed Reptisun compact lamps.
launched some of their new range towards the end of
last year, and they are still in the process of re-developing
and improving some of the products we tested back
then. They were sent a copy of our full report for
their comments, in August this year. As soon as we
hear from them, we will prepare our final report for
publication here on UV Guide UK.
have already launched their re-formulated compact
lamps in the USA and stocks of the European version
are just beginning to arrive in the UK. We have published
the preliminary results of our tests on these lamps
in the Files section of the UVB_Meter_Owners Yahoo
Group, and as soon as the tests are completed we will
write the final report for UV Guide UK.
advise prospective purchasers to ensure that they
are buying the latest version of the product. How
ZooMed Reptisun Compact Lamps
have an information leaflet which includes pictures
and advertising for the Deep Dome Lamp Fixture.
This product is not specifically mentioned on leaflets
in the boxes containing old stock.
Zilla Desert 50 Series and
Tropical 25 Series lamps have pictures of
the lamp spectrum and a "UV Index" chart
printed on their boxes.
hope to publish test results for all the reformulated
lamps very soon.