I recently put a 24 Watt grow light on top of my enclosure for the schefflera plant I have, but I only used it because I just happened to have it lying around for something else. Is it ok? Or should I go higher or lower?
That shouldn't put out much if any heat, so you should be just fine with your current placement.
I think that's a good choice actually. The colour temp is good, being towards 6500k. even at 24watts it should be bright enough to help a Shef.
I had to get rid of the schefflera, it had aphids. Seems to be doing better outside... but that doesn't do Mr.Pink's house any good.