we use them on our 25 gal
tall. we have a ho
day and three actinics. we have mostly mushrooms and leathers in the main tank, which are growing very nicely, they seem to like it. we also have two no day bulbs over the 10 gal
sump which houses polyp, xenia, and leather frags
we intend to sell to our lfs
. kind of a little grow out system. everything in there is growing very nicely as well.
the bulbs do get a little hot, but as long as you have an open back, they seem to fine. you could even throw a fan in there as well. i cant see them burning your house down.