I don't think you can get lights too bright, only too close. That said, I think you may want to consider the flexibility multiple bulbs would give you over a panel. I have one of these bulbs (no longer available but there are similar ones) on a catt and it was enough to redden the leaves so I moved it up a little, about 8" away from the highest leaf seems good. That would probably fry a phal though. I think you would also get more coverage for less money with these, you could have one low for high light , one a little higher up for intermediate, and your phals around the edges where the light is weaker.