CFLs you can get almost anywhere... they're the energy saver bulbs... The ones that light up white... The ones that come in long tubes (4 feet tubes, circular tubes, etc.).

And HPS, well, do an internet search (maybe froogle)... there are some really cheap systems out there.

I understand you only need light for a 3x4 spot... but honestly, don't use that halogen... you're going to fry everything.

Best to you,

-turtle420