73794368
Apr 20, 1989
Feb 13, 1990
LIGHTING SYSTEMS COMPRISING HYDRAGYRUM MEDIUM ARC-LENGTH IODIDE (HMI") GAS DISCHARGE LAMPS OF FRESNEL AND PARABOLIC ALUMINIZED REFLECTOR ("PAR") TYPES, AND FIXTURES, AND FIXTURES, BALLASTS, CABLES, LENS, STRIKERS, DIFFUSION, AND INTENSIFIERS
Environmental Control Apparatus