http://lightsofamerica.com/wl.htm -I got the the 6165 model (the biggest/ with the yellow colored reflector). the bulb is 3"x3"x 9"L and with the reflector has 4,550 lumens.

here are the rest of the specs-Watts Used 65
Incandescent Wattage Equivalent 500
Size (H x D) 17" x 14.5"
Lumens 4,550
Efficiency87%
Life 10,000
CRI 84
Color Temp 6,500
Op. Voltage 120V
Op. Freq (Hz) 50/60
3-Way NO
Dimmable NO
Outdoor Use (damp) NO
UL YES
CSA YES
Energy Star NO
Replacement Bulb 9166B

now will this work for a 4'x4' area, if not how large of an area will it work for?
Is this better than cfl's?
Specialist Reviewed by Specialist on . 500 watt output flourescent light!? http://lightsofamerica.com/wl.htm -I got the the 6165 model (the biggest/ with the yellow colored reflector). the bulb is 3"x3"x 9"L and with the reflector has 4,550 lumens. here are the rest of the specs-Watts Used 65 Incandescent Wattage Equivalent 500 Size (H x D) 17" x 14.5" Lumens 4,550 Efficiency87% Life 10,000 CRI 84 Color Temp 6,500 Rating: 5