The problem is that the lights never go out, and plants need a rest just like the rest of us. Would like to give you a better answer, but don't know of one.

As plant environments go, yours is "low light," because the bulbs are pretty far away from the foliage. Houseplants that have low light requirements, such as pothos, would probably do fine; I grow one that is lit only by a fluorescent bulb a few feet away, and I leave it on 24/7 when I'm away from home. Pothos has a trailing habit and is not fussy about temperature or humidity. There are probably plenty of other choices that grow upright but slowly, if that's what you prefer.

As Lucy says, plants like a period of nighttime rest, but a lot of houseplants are pretty tough, and they're almost always quite inexpensive. You could pick a type you like and replace it every year or two if necessary.

Try the House Plants Forum for some more specific suggestions.

The "standard" office plants like Pothos, Spathyphyllum, Aglaonema (sp?), Dracaena etc. should do OK under those conditions even if they may not thrive over the long haul. But they'll hang in well enough and may even surprise you by growing well for years. For the floor, rubber plants are, IMHO, pretty boring as indoor plants but they're pretty tough and it's better than looking at office carpeting/bare wall all day... Ficus are nice too, but they tend to shed leaves when you change their environment and in those conditions, they'd be slow to replace them.

Thank you for all of the wonderful suggestions. I think I will research the plants that were suggested to see which I prefer. Would it help if I drape the plant before leaving work and take the covering down when I return? Or is 13 hours of darkness too much?

Yes, it probably would help if you're willing to go to that much trouble. If it were me, I'd try both ways for a few weeks and see if there's any noticeable difference. For slow-growing, easily replaceable foliage plants, though, I'm not at all sure it'd be worth the effort.

Another trick is to rotate plants in for a couple of months at a time from a more suitable environment (home, for example). The "quality time" they get growing under good conditions will fortify them for their stints under your office fluorescents. Restaurants and other places with unsuitable lighting often do this. So did a hydroponics/lighting store I visited a few weeks ago, which had tomato plants growing under T5 fluorescents and admitted that they rotated them in from an outdoor greenhouse!