I was recently given a Serissa foetida bonsai as a present and want to make sure that it will get enough light in my dorm. The window I have it placed next to is about 18 inches wide and about 3 feet tall with southern exposure. I visited a greenhouse where they sell bonsai and a man mentioned that a grow light might be beneficial for my plant. He said that sometimes plants accustomed to living in a nice greenhouse atmosphere are shocked when they move to say a dorm where they won't receive as much light and that they might loose some leaves.

My questions are:

1. If the leaves begin to drop, which type of grow light would you recommend?

http://www.amazon.com/Hydrofarm-LKIT60-Dayspot-60-Watt/dp/B000053F9J/ref=sr_1_9?ie=UTF8&qid=1295361586&sr=8-9

would this ^^ one be ok? I'm looking for something relatively small (dorm size) and not too pricey and also one that would be beneficial to maybe some other plants that I keep in the dorm.

Thanks