Unit of electric lamp and reflector
Unitary ballast structure for operating four fluorescent lamps
Unitary light source comprising compact HID lamp and incandescen
Unitized theater lighting system main power unit
Universal arc-discharge lamp systems
Universal ballast control circuit
Universal cold-cathode type ion source with closed-loop electron
Universal electronic ballast
Universal electronic ballast for a family of fluorescent lamps
Universal electronic ballast system
Universal electronic plug-in replaceable fluorescent lamp...
Universal fluorescent lamp ballast
Universal hardware/software feedback control for...
Universal high intensity discharge electronic starter
Universal ignition circuit for high pressure discharge lamps
Universal input dimmer interface
Universal input voltage device
Universal input voltage device
Universal input warm-start linear ballast
Universal lighting network methods and systems