Originally Posted by Dee_Dee_fish
what about T5 lights with acnitic bulbs? You have all answered a lot of my questions. thanks!!
nope, t5's wont support much, you want a minimum of 2w/gal
so if the t5's are 15w high output bulbs he would need a 4 bulb fixture for a 20g and that gets expensive fast plus replacing all 4 bulbs every 4 months is a pain in the wallet as well.