Ambient light responsive illumination brightness control circuit
Apparatus and method for switching a light source
Arc lamp stabilization
Automatic indoor lamp unit
Automatic on/off device for a lamp
Backlight control device for an LCD
Ceiling fan with a light-sensitive circuit
Closed loop lighting control system
Compact fluorescent lamp circuit
Constant illumination control system
Constant output light emitting device
Device for regulating luminous flux of battery powered headlamp
Device permitting of economizing electric lighting energy
Dimmer control circuit
Driving arrangement for a varying color light emitting element
Electrical energy discharge control
Electrical energy discharge control
Electronic adornment for simulating natural flickering light
Electronic jewelry simulating natural flickering light
Feedback control system for applying AC power to ballasted lamps