I was looking into these lights myself. I have a 120gal tank thats 60inx18x24 and I was wondering if 2 30in fixtures would be enough for medium light. I don't want or need to grow anything fancy. I have 2 30in aqueon modular led light bars now with them fully maxed at 3 strips each and I just want a nicer look to my tank as these seem to grow things ok. I didn't know theres a coupon for 10% off that makes me want to order them now LOL.