Lamp failure indicating circuit

Lamp monitor and lamp

Lamp, ballast and starter visual monitor

Lamplight failure detection system

LED indicator device for AC power plug or socket

LED lamp device

Light grid for detecting objects in a monitoring region

Light output control method and lighting system using the same

Light system for use especially by operating theatre

Light-output-controlled fluorescent lighting fixture

Lighted switch apparatus

Lighting device with night light and human body sensing...

Lighting failure detector for a luminaire

Lighting indicating device having plural illuminating elements w

Load control device having a visual indication of energy...

Low leakage current LED drive apparatus with fault...

Low pressure gas discharge lamp ballast with on-off indicator

Low watt metal halide lamp apparatus

Magnetic automotive lamp current sensor

Magnetic low load factor series ballast circuit