They are bright enough for my current application which places the bulb about 41" from the surface that I am illumiating. As far as room filling light, I have not checked them yet.

iMac --> ATV --> 568.1 --> M33 LCR + M555 --> AIM8Five + B&W PV1 + Panny 50" HD
iMac --> Apogee Duet --> Neumann KH120A
Anapeg SD11 Pedal Steel Guitar --> Hardwire RV7/DL8 --> Telonics FP100 Volume Pedal --> Little Walter Tube Amp --> Telonics Cab + Eminence EPS-15C