I had the 440 watt setup stored at the house, I use to have 2x400 mh and 440 watts of vho and I took the vho out about a month ago. I now have 2x400 and 2x40 watts of actinic. I use 15k bulbs so the actinic are just a dawn dusk type setup. I was just concerned because I didn't think they would even light it up. I would just hate to see this beautiful tank hood burn up because he is using those bulbs.