Photoperiod – The photoperiod is simply the length of time your iguana is exposed to light each day. The recommended photoperiod for iguanas is pretty simple: plug your heating lights and ultraviolet lights into a timer so that they turn on for about fourteen hours each day. As the seasons change, I alter my timer so that their lights turn on when the sun comes up, and turn off fourteen hours later.
In addition to providing your iguana with its own lights for fourteen hours a day, it is essential that you do not keep lights near your iguana’s enclosure on all night. The photoperiod is an important part of your iguana’s life. It can become stressed if it never has periods of darkness. So if you are a nightowl and tend to stay up all night with lights and televisions on, please place your iguana’s cage in a room that you would not spend time in.