Lighting Solution?

[Delphinus]

I think it would help, but you definitely first want the return(s) lowered. Obviously we all know heat rises. So the return will pull air downwards. If the return is in the ceiling, and the vents are in the ceiling, the hot air comes out at the top, stays at the ceiling then gets pulled back into the return. If the vents are in the ceiling, and the return is at the floor, then hot air comes out at the top, but will at least have a force trying to pull it down. If the vents are on the floor too, then hot air comes out at the floor, and pulled out at the floor (just like the other levels of the house, usually), and this does seem to be more comfortable (from what houses I've seen like this, anyways). Of course, most often basements are developed with both vents and returns at the ceiling, which makes it a PITA after the fact to change around, so if you're thinking about developing your basement I do recommend giving this some thought. It's not always possible to lower your vents (for one, they will have to be in a wall unless you're keen to rip up your floor), but usually the return can be on a wall so that's no biggie.

Alternatively, set up two or three tanks using halides in the basement, I guarantee this will warm up your basement too. (Worked for me anyways 8) )