There is no question that natural sunlight is much more beneficial than any kind of artificial
light to most species of animals. This is especially true in most lizard species where absorption of natural ultraviolet (UV)
radiation is essential in calcium metabolism.
Even if the animal is receiving adequate amounts of calcium in its diet, if it is not absorbed
into the body, metabolic bone disease can result.
When the animal's skin is exposed to natural sunlight, a process occurs in the body resulting
in vitamin D3 production, a key ingredient in the metabolism of calcium. For the record, ultraviolet is divided in to
UVA(longwave), UVB(midwave) and UVC(shortwave) and it is thought that UVB is most essential in vitamin D3 production.
For those of you fortunate enough to live in a temperate climate zone without great fluctuations
in temperature and humidity, keeping your Panthers outdoors is ideal. Unfortunately, most of us who live in the USA
do not live in the ideal conditions and are forced to raise the Panthers mostly indoors. Although I live in Southern
California, and only about 30 miles inland from the ocean, the summer time temperatures can exceed 100 degrees at
times and in winter, they can drop to near freezing temperatures with accompanying frost. These temperatures are
much too extreme for Panther Chameleons to tolerate.
However, for those of us forced to raise our animals indoors, all is not lost. In some
respects, I believe raising Panthers indoors can be superior to keeping them outdoors all the time. While indoors, it
is much easier to control temperature and humidity to the Panther's optimal levels at all times. Of course it is essential
that you use proper lighting that is capable of producing UV radiation. There are several fluorescent lights on the
market that produce adequate amounts of UV A and B radiation. Do not be confused by less expensive fluorescent lights
that can be purchased at the local hardware store marked as "full spectrum" or "simulates natural sunlight". Being "full
spectrum" does not mean it is capable of producing UV radiation. In fact the light should be labeled with a warning
cautioning its use only with reptiles (excessive exposure to UV radiation by humans can lead to skin cancer). I also
use a small incandescent light bulb (40 to 60 watts) in conjunction with the fluorescent light to provide additional heat
for the animals to bask because most Chameleons are heliothermic, meaning that they use the heat of the sun to regulate their
body temperatures.
There is a relatively new product on the market that is called UV Heat. It is a mercury
vapor light that is capable of producing high levels of UV rays as well as provide basking heat. Although these
lamps produce a lot of UV radiation, they do not seem to produce a lot of visible light. Chameleons generally enjoy
high amounts of visible light and without it, they usually do not show their full color potential. For this reason,
we prefer using the fluorescent light/incandescent light combination over the single Mercury light bulb.
Despite having to raise your Panthers indoors due to inhospitable climates, you should
still be able to let your animals enjoy natural sunlight periodically as the weather allows no matter what part of the country
you are living in. It is essential to do this as much as feasible to ensure the health of your animal and any future
generations if you plan to breed. During spring or fall, the climate in North America should be mild enough to allow
quite a bit of time outside. We always try to leave our animals outside at least during the weekend as climate condition
allows. It is generally thought that as little as 15-30 min. of natural sunlight a week is better than a week under
man made UVB lighting.