I buy my light fixtures at home depot, I just use the big metal garage lights. They work great, and are much cheaper. But I buy red bulbs for my leopard geckos at the local pet store. I don't know the brand, but they're for nocturnal reptiles.
Personally i like the Dimmers that flukers sell because i can change the heating prefernces. When the bulb is almost out i dim it down so its easier to get heat and save the energy. I also use the dimmer to make sure its not a blinding light because thats what happens when you buy a light fixture that dosent have a dimmer. Normally with out dimmers the bulb goes to the max brightness which even hurts my eyes if i look at it. So for the geckos best interest i use Dimmers for day and night! I also use purple UV lights bulbs.