i am not sure of the tube type. these are the ones my neighbor was disposing of. i will check the bulb types later when i get home. as far as the temps are concerned , i will just increase the fan size. i plan on building a filter underneath consisting of the metal filters in the exhaust vent hoods from above a stove. i plan on soaking them in neem oil so as to negativley effect any incoming pests . it will also cover any escaping light.