Heh. Figures I'd post my opener by seeming to disagree with our host. Pre-apolgies Rob. I agree 250 is pretty intense, but perfect for some breeds.
I'd say that if you want to keep Crocea and Maxima clams 250 is perfect. I have a maxima that's maybe a foot away from a 250w DE 14K Reefstar lamp (the lamp is about 8" from the water surface) and he's ... what's the metaphor for "happy as a clam" when you're actually talking about clams? There will be nowhere to hide for low-light creatures, but I've seen even more intense setups than mine at one of our local stores here. I also have some Derasa's on the bottom, but they are relatively low light clams in demand.
It should be noted, though, that the
PAR on a 14K bulb is considerably lower than on a 10K in double ended bulbs, but many breeds of clams will eat up that kind of intensity. Of course, it also depends on what your source is raising them in as well. My
LFS of choice for clams uses pretty intense lighting.
When I get my 60 cube set up, I'll be putting a 400w DE bulb + suplemental
T5's on it for a similarly intense setup.
