I have a UVB light that a got a while ago(less than a year though) and I was wondering if I could use it for my Tokay gecko. She doesn't really get much light. She also has eggs in her tank, if that matters. I already have a red heat lamp for her during the day that lets off light, but it's red light.
I never had issues with the use of UVB in a Tokay's enclosure. Just keep it at least a inch off the screen so the tokay can't get burned. And measure the heat especially since you have eggs in the tank. I'd keep it off in a corner since Im sure you have a tall tank for the tokay rather than Long. Should be fine though. If you have a dimmer use that to control the amount of light and heat it gives off.