The units I alluded to earlier are something like 500 watt equivalent CFLs; about 130 watt input. They do a pretty good job for me and are certainly more pleasant to work under than the 600 watt halogen worklights I used to use. Some of the 'daylight" lamps appear in the world of grow lights and the greenhouse plant world -- don't know if they are any cheaper that way vs photo stores. I get the sense the equivalent wattage claim is a trifle optimistic, but then that could be from comparing them with halogen lights as opposed to more conventional tungsten bulbs. The old traditional tungsten photoflood bulbs typically have a service life in the 25 hour range, whereas the CFLs are several thousand, so long term that could be helpful. However my experience to date is that the cheap household CFLs do not come anywhere near their claimed life. Some of that may be the "fine print" requirements like burning them base down, etc.