These devices are roughly the same size and form factor as their stationary counterparts, but with significantly lower light output. After installing 5 fixed 4" Lithonia discs, each producing 750 lumens, the 2 pendant lights I installed on the adjacent vaulted ceiling were disappointing: only 680 lumens - about the same output as a standard R30 65 halogen free light I think I should have used a 6 inch bulb for this application, but why can't Lithonia produce a 4 inch gimbal version with the same 750 lumen output?