I'm currently using T-5 florscent bulbs.Blue spectrum bulbs promote vegetative growth and red spectrum bulbs promote budding/flowering.So in a perfect world,a 50/50 mix for bulbs would be best.T-5 set ups are like anything else,you can go low budget or skies the limit $$ . T-5's might cost more on the front end, but are lower wattage and more intense light.More bang for the buck.There are a few people on here that have invested in LED grow lights.I do not know anything about them.The Hydro-store that I go to will not carry them ? Something about a NASA study growing lettuce ? I hope this helps.Good Luck,Rich