Hm, I'm no expert on indoor supplemental lighting, Pamela but pretty sure that's not nearly enough light. I think you'd need 3 or 4 more of those to give all your plants any kind of a light boost. Didn't you say you have 12 pots at the moment? That's going to make it way too hot for them, too. Probably present a fire hazard as well.
Think about where these plants grow in nature. They have bright sunlight coming from above all day long (well some of them like some shade). But most of them are tropicals so really strong sunlight. That one little bulb shining sideways on them isn't going to be nearly enough even if you leave it on for 15 hours per day.
Regular room temperature is fine for most indoor plants through the winter. Unless it's really cold in your room there, I would take that light back and get a real "Grow light". Honestly, I think you'll do a lot better, both for energy usage and for better lighting, if you can set up a fluorescent fixture with good "Grow light" daylight bulbs for your plant area. You need to have them turn on every day for at least 8 hours, and keep an eye on the plants because they may want more.
Here's my setup for starting seeds - one little fluorescent tube on a stand will light one tray of 72 seedlings. The light needs to be as close to the plants as it can be and it's on a timer so it comes on at 7am and turns off at 11pm.
You need something a lot bigger and stronger light than this for your big tropical plants.
