light and circadian rhythm have been studied in animals through the production of melatonin ..... blue light blocks the production of melatonin red light does not , at least that's what I remember .....the health benefits of near ir light has been extensively studied , the mechanism for some of these health benefits is known ..... color blind does not mean not able to see color ..... some nocturtnal , maybe all , can see color in total darkness ........... keeping lights on an animal for 24/7 will create a stressed sick animal ...... they did a test at the Cleveland zoo to test circadian rhythm in nocturnal animals , they had to stop the portion of the experiment where the blue light was used at night as they began to get stressed sick animals ............ I've kept turtles and tortoises longer than these che's have been available , or at least before I ever seen them , brooder lamps have always been available . I use che's now , they last a long time and end up being way cheaper than ir bulbs ....... I use the ir bulbs on some p.manni that come in for the winter , I use it inside and out , when they're inside the red light is on 24/7..... a few of them have been here as long as I have lived here , 25yrs , they are prolific breeders , and never get sick ..........
Were these tests done on a variety of Chelonian species?