Thanks for your replies. I dont think that I am gonna get it. I want to set up my first indoor rig but I dont want to pay unreasonable electrical charges. The CFLs and T5 options you seem to recommend do not consume much electricity but costs do add up. I imagine that a Plasma lamp would consume as much as a High Intensity Discharge.

What would you purchase or construct if you were less concerned with the initial costs than you were about the electrical bills ?