Cathie

Hi, you obviously can't keep it outside where you live (certainly not year round!), but the thing is that unfortunately, your office conditions are about as bad as they can be for the tree. You say you only have north light at home, but plants can adapt surprisingly well to low light, and if you were to find just a foot or so near the window to keep it, and use your grow light right up close (6" isn't too close and 60w is nothing to a ficus) in early and late a.m. + p.m., it might be better off, as you can control the conditions more effectively. Don't panic now because ficus lose leaves like mad in new places, and can take weeks (if not longer) to start producing again, but the trick is to put them in the brightest place you do have, water well but only when more of the soil than less of it's dry, especially with low lighting (use an unvarnished stick of wood left in the soil like a dipstick every day to judge wetness til you're sure of its needs) and to put its pot on stones in as wide a (likely plastic - $1-2 at Wal-Mart, etc.) drainage tray as will span the foliage spread, fill it with water, but never ever enough to touch the pot so roots won't wick it and rot. I think that with patience you can be successful, so do give it time. And this is just a thought of mine - lots of people will give you things in life, but not every thing that's given is necessarily practical or desirable for you to keep, and if for some reason you feel the plant's just not suitable or whatever, I'm sure if you were to ... give it away, no one would think badly of you at all. You don't have to prove anything to your friends... you already did that by accepting what was a very nice gesture, and that's what counts. Good luck with it if you decide to keep it though.