Retired electrician here. I've done many lighting (efficiency) upgrades in factories over the years as technology moved up. I've been using CFLs in the home for a few years now. I did our church's lighting upgrade to 200W CFLs this past year. They do work really well. My home electrical use went down quite a bit, until I started indoor growing. This present crop I am using the flourescent lighting exclusively. My impression is that the HPS lights worked very well but the plants that were under flourescent only did just as well. We'll see.

Shovelhandle