Looking forward to this. Depending on the success you have (meaning yield) Ill replace my 250w HPS with a bunch of CFLs. Mind you, its handy to have in the winter because it warms up my cab. Meh, maybe Ill get some CFLs next year. How much heat do those eight CFLs push out? If I remember correctly your cab is about the same size as mine, maybe a tad smaller.