I've never had hum problems from my Littlite. It wouldn't be from the rheostat anyway. It's just a simple resistance pot like a volume control. It's not like a wall dimmer. The only source of hum might be the wall wart (transformer) itself, but I have mine plugged into a non-system wall outlet and never had a problem. It's ohly putting out 12V AC so it's not radiating much of a field anyway.
You'll have to ask Doug about the LED version, but my understanding is that it's either white light (high) or red light (low) and that's it. But that shouldn't be a problem either, because that's pretty much the way you would use it anyway (high or low but not in between.)
What I'd like to know (Doug) is whether the LED version (on high/white) is brighter than the halogen version on high? If it is, I'm going to get one of those because I'd like a little brighter light.
You'll have to ask Doug about the LED version, but my understanding is that it's either white light (high) or red light (low) and that's it. But that shouldn't be a problem either, because that's pretty much the way you would use it anyway (high or low but not in between.)
What I'd like to know (Doug) is whether the LED version (on high/white) is brighter than the halogen version on high? If it is, I'm going to get one of those because I'd like a little brighter light.