here's what I knocked up. I've got 4 CFLs in there at 20W and about 1200 lumens each. Not much at all, it runs really cool and uses less than £3 worth of power each month. I'm just playing about with this really, to see what can be done. I'm not expecting much from it but I made it for about £30 including bulbs and it's pretty stealthy now that I have swapped the brown tape for a magnetic strip to hold the front on.