I use CFLs in my stock 10g hood. I buy ZooMed UltraSuns because they fit my hood great and grow plants really well. http://www.amazon.com/gp/aw/d/B003QZ...8862052&sr=8-1
. You can get similar mini CFLs to fit your hood two bulb fixture. Just make sure they are around 6,500K and not actinic or 50/50 bulbs, those are for saltwater.
You will quickly lose fish with that stocking plan in my opinion im sorry to say. Platies and Guppies breed easily so you have no room for fry. 3 Platies are a lot for a 10g. I'd do just a trio of Guppies if you want to breed or 2 male Platies so you don't have babies.
Livebearers are big eaters and messy for their size. Stock lightly. Plan plenty of water changes for small tanks. Go slow. Try just Guppies or just Platies or I think your water quality will crash quickly.
Live plants will help. Crypts will need the CFLs and enough substrate for roots. Sand is fine. 2" minimum. Root caps every 4 months. They are heavy root feeders. Liquid ferts 1x weekly after water changes.
What will you do with babies ?? Plan ahead.