Well, since the geckos will be sleeping during the day when the lights are on, I wouldn't worry about them not being able to see or how sensitive their eyes are to it. They'll just go and hide in a dark place to nap anyway. They don't really like bright lights, but I think it's more because they're exposed and prefer the dark so they can hide easier.
Any light you add will serve 2 purposes:
1) to raise the ambient air temperature. Heat pads do a good job of raising the ground temp, but not a great job of adding air heat.
2) to provide a consistent day/night schedule.
So it's a good idea to have a light to give them nice warm air while they nap during the day. And ideally you want to hook it into a small timer to give them consistent times to wake up and go to sleep. Usually they'll bolt for their hide as soon as the light comes on and go to sleep, and then about half an hour after the light's turned off they'll come out all sleepy eyed looking for dinner.
You can find cheap timers at the hardware store ($5-10).
>>Right now my sis has 2 geckos in a 10 gallon tank with a heat pad under the tank...Should she have any lights on top for heat as well? At night she usees a red light..What about during the day? What should she use? I read that geckos cant see with bright light.. Thanks
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Blaine
0.0.1 High Yellow Juvenile Leo (Echo)