1
Susan J Leong, John Kit: Power controls with photosensor for tube mounted LEDs with ballast. DeNovo Lighting L L C, February 17, 2009: US07490957 (114 worldwide citation)

A power saving device for a light emitting diode (LED) lamp mounted to an existing fixture for a fluorescent lamp having a ballast assembly and LEDs positioned within a tube and electrical power delivered from the ballast assembly to the LEDs. The LED lamp includes means for controlling the delivery ...


2
Leong Susan J, Kit John: Power controls with photosensor for tube mounted leds with ballast. Denovo Lighting, Leong Susan J, Kit John, WONG Kam L, March 29, 2007: WO/2007/035203 (1 worldwide citation)

A power saving device for a light emitting diode (LED) lamp mounted to an existing fixture for a fluorescent lamp having a ballast assembly and LEDs positioned within a tube and electrical power delivered from the ballast assembly to the LEDs. The LED lamp includes means for controlling the delivery ...


3
Susan J Leong, John Kit: Power controls with photosensor for tube mounted LEDs with ballast. DeNovo Lighting, Susan J Leong, December 22, 2005: US20050281030-A1

A power saving device for a light emitting diode (LED) lamp mounted to an existing fixture for a fluorescent lamp having a ballast assembly and LEDs positioned within a tube and electrical power delivered from the ballast assembly to the LEDs. The LED lamp includes means for controlling the delivery ...