An LED light tube includes a glass tube, end caps, an LED light strip, LED light sources, and a power supply module. The end caps are respectively attached at two ends of the glass tube. The LED light strip is attached to an inner circumferential surface of the glass tube. The LED light sources are mounted on the LED light strip. The power supply module is electrically connected to the LED light strip. Each of the end caps includes a lateral wall and an end wall. The lateral wall is substantially coaxial with the glass tube and connected to the glass tube. The end wall is substantially perpendicular to an axial direction of the lateral wall and connected to an end of the lateral wall away from the glass tube. The power supply module includes a rectifying circuit and a filtering circuit electrically connected to the rectifying circuit.

An LED light tube includes a glass tube, end caps, an LED light strip, LED light sources, and a power supply module. The end caps are respectively attached at two ends of the glass tube. The LED light strip is attached to an inner circumferential surface of the glass tube. The LED light sources are mounted on the LED light strip. The power supply module is electrically connected to the LED light strip. Each of the end caps includes a lateral wall and an end wall. The lateral wall is substantially coaxial with the glass tube and connected to the glass tube. The end wall is substantially perpendicular to an axial direction of the lateral wall and connected to an end of the lateral wall away from the glass tube. The power supply module includes a rectifying circuit and a filtering circuit electrically connected to the rectifying circuit.

An electronic driver for transforming an electronic ballast input voltage into an operating voltage for an LED lighting module. The driver includes a flicker eliminating circuit, which is adapted to operate in a saturation mode when the input voltage is below a threshold voltage. It operates in a switch mode when the input voltage is above a threshold voltage. A voltage drop in the flicker eliminating circuit in the saturation mode is higher than in the switch mode.

An electronic driver for transforming an electronic ballast input voltage into an operating voltage for an LED lighting module. The driver includes a flicker eliminating circuit, which is adapted to operate in a saturation mode when the input voltage is below a threshold voltage. It operates in a switch mode when the input voltage is above a threshold voltage. A voltage drop in the flicker eliminating circuit in the saturation mode is higher than in the switch mode.

An electronic driver for transforming an electronic ballast input voltage into an operating voltage for an LED lighting module. The driver includes a flicker eliminating circuit, which is adapted to operate in a saturation mode when the input voltage is below a threshold voltage. It operates in a switch mode when the input voltage is above a threshold voltage. A voltage drop in the flicker eliminating circuit in the saturation mode is higher than in the switch mode.

An electronic driver for transforming an electronic ballast input voltage into an operating voltage for an LED lighting module. The driver includes a flicker eliminating circuit, which is adapted to operate in a saturation mode when the input voltage is below a threshold voltage. It operates in a switch mode when the input voltage is above a threshold voltage. A voltage drop in the flicker eliminating circuit in the saturation mode is higher than in the switch mode.

A lamp including a light source including at least one string of light emitting diodes (LEDs) within a tube body; end caps having contacts on each end of the tube body; driver electronics within the tube body including a filament detector portion provided by a passive resistance capacitor (RC) circuit that simulates the filament load of a fluorescent lamp when installed into a ballast containing fixture; and a power level selector switch in communication with the driver electronics for selecting the power level for powering the light source.

A linear light-emitting diode (LED) lamp comprising an emergency circuit is used to replace a luminaire operated in a normal circuit with alternate-current (AC) mains. The normal circuit comprises a step-down regulator circuit and a load control relay whereas the emergency circuit comprises a rechargeable battery, a step-up regulator circuit, and a self-diagnostic circuit. The linear LED lamp can be auto-switched from a normal mode to an emergency mode according to availability of the AC mains and whether a rechargeable battery test is initiated. The load control relay is configured to convey a forward electric current and a reverse electric current to and from the LED arrays. The self-diagnostic circuit is configured to provide a test sequence and to auto-evaluate battery performance. The step-up regulator circuit adopts an unconventional low power scheme to prolong an emergency lighting time using a limited power of the rechargeable battery.

A linear light-emitting diode (LED) lamp comprising an emergency circuit is used to replace a luminaire operated in a normal circuit with alternate-current (AC) mains. The normal circuit comprises a step-down regulator circuit and a load control relay whereas the emergency circuit comprises a rechargeable battery, a step-up regulator circuit, and a self-diagnostic circuit. The linear LED lamp can be auto-switched from a normal mode to an emergency mode according to availability of the AC mains and whether a rechargeable battery test is initiated. The load control relay is configured to convey a forward electric current and a reverse electric current to and from the LED arrays. The self-diagnostic circuit is configured to provide a test sequence and to auto-evaluate battery performance. The step-up regulator circuit adopts an unconventional low power scheme to prolong an emergency lighting time using a limited power of the rechargeable battery.

A dimmable lamp tube is provided, which includes a first lamp head, a second lamp head and a lamp tube body. The first lamp head has a brightness adjustment switch. The second lamp head has a power adjustment switch. The lamp tube body includes a circuit board and a plurality of light-emitting elements. The light-emitting elements are disposed on the circuit board. The circuit board includes a brightness adjustment switch connection terminal and a power adjustment switch connection terminal. The brightness adjustment switch is connected to the brightness adjustment switch connection terminal and the power adjustment switch is connected to the power adjustment switch connection terminal.