More people need to look into T5 lights, mush easier on the heat and energy bills compared to HPS. And yes T5 HO put out more PAR and lumens per watt than CFL, HO and VHO florescent bulbs. I may rent a Apogee meter to test the out put of my lighting and post up results, I need to test the PAR on my reef aquarium once I get new bulbs for it anyways.