I have these, blue and pink. They are under 300w t5's (4 bulbs) with 2 blue actynic t5's. They are spreading like a weed. They are super easy to make happy. If you aren't going to buy them from SWF.com, check out local reefers, they spread so fast, you can get them super cheap. I paid $15 for 12 frags of the blue and pink, each frag had 10-20 stalks.