if you have a bucket to toss tank water into you can have other plants for cheap also. for $3 - $5 you can get the bulbs at walmart. some of these guys will grow in a dark closet with no lights... lol. the reason i suggest a separate bucket is sometimes the bulbs come with ich. 2-3 weeks under water at normal temps with no fish and they can't find a host to continue they're life cycle though, so that kills them off completely.
for the moss i definitely agree with the stringy post. the way to beat that though is to have wood or a rock structure that approaches the top of the tank and affix the moss close to the lights.
that's an excellent read also from rexx grigg. may i suggest the barr report and some information from chuck gladd to fill in the gaps. googling tom barr, plantbrain, and chuck gladd should give you more information than you'll ever want to want to read... but you very well may want to eventually. lol, it should make sense the second time around.