Yeah, florescent lighting is taking over the isles at Wal-mart if you take a look. It's not hard to find incandescent light, but they are definitely not promoting it. Yes, the limit is 60W, but with a "daylight" florescent that puts out 1600 lumens, it only uses 23W. On my other ficus, I have a 1200 lumen 13W light. From the lighting tables that I have, they show that a ficus needs at least 1000 lumens to grow. For about $25, you can provide that pretty easily. Add in $5 for the plug timer, and you really never have to worry about it. Costs less than $5 in electricity per month. No way the misses is going to let me put one of those huge 4 foot fixtures in the house, and I do enjoy having these plants around me at night to look at from time to time. I have something like this:
