Universal lighting network methods and systems
Universal platform for phase dimming discharge lighting...
Universal power supply for discharge lamps
Unsaturating transformer, an electronic ballast using the...
Upper and lower distortion correcting circuit by modes
Use of a free space electron switch in a telecommunications...
Use of a free space electron switch in a telecommunications...
Use of arc straightening in HID lamps operated at VHF...
Use of incomplete energy recovery for the energy compression...
Use of silicon to extend useful life of metal halide discharge l
Use of silver and nickel silicide to control iodine level in ele
User controlled deflection apparatus for correcting upper and lo
User interface for a lighting system that allows geometric and c
Using a magnetic field to locate an amalgam in an electrodeless
Using a triangular waveform to synchronize the operation of...
Utility emergency lamp and solid state switching and battery cha
UV continuous spectrum lamp and its lighting device
UV Radiation triggered rail-gap switch