Thanks for the info Pampee. Can I expect good coverage running leds over acrylic ? What a pain in the butt deciding. I don't even know if its worth the huge expense. Anyone run their leds over acrylic ?? Right now I run 2 175w Iwasaki bulbs 10k (per your suggestion). Thank you. They're great !! Two 60" t5s at back (penetration questionable) and one Reefbrite 60" led at front (penetration questionable) [smilie=worried.gif] ,this sounds dirty [smilie=lol.gif] . Anyway, quite the mix, but was looking to cut costs. Especially in summer with the chiller, plus I like all that pop that's had with leds.