I have two stacking cages. Currently have 18" Reptisun 10 lights above each with domes holding daylight heat bulbs and night time heat bulbs.

Now that spring is here the heat bulbs won't be used much BUT I would like to add some additional light that does NOT emit heat as the cages are a bit too dark (they are wood sided so they don't get much natural light).

Any ideas on a bright/low or no heat light bulb would fit in the 6" dome light fixtures? I would rather use the light fixtures that I have rather than get two more long fluorescent light holders (they seem to be a pain regarding the bulbs turning on etc...)