That's the 27 watt quad right? I think the color temp is listed around 2700k some where in the box. I ran this bulb on my newly setup 20 gal long sump. I placed it over the middle partition which has a DSB. With the bed I'm guessing I'm lighting a 6 gal space. I had caulerpa and sargassum growing under this as well as lots of cyanobacteria. I switched to a 6700k bulb, cyano still grew well. Finally the DSB has matured to a point where caulerpa is starting to grow without being overtaken by cyano. I also have several frags under this light. Mushrooms, toadstool leather, sea mat, and anthelia. They are doing fine under this light but not growing fast.
I would like more light over my sump, but don't want to spend the money.
This bulb doesn't run too hot. I took the plastic shield off and mounted the fixture in a small hood.
[ August 31, 2001: Message edited by: fishfarmer ]
[ August 31, 2001: Message edited by: fishfarmer ]