The present application relates to an easy-to-install LED double-ring ceiling lamp, including a base plate, a LED light source board, a driving power supply, a translucent cover and a press ring. The LED light source board and the driving power supply are installed on the base plate, the translucent cover is covered on the base plate, and the press ring is covered outside the translucent cover and configured to support the translucent cover. The press ring and the base plate are detachably connected by multiple installation column-shaped bolts, and at least one of the multiple installation column-shaped bolts is a bendable installation column-shaped bolt.

A multifunctional LED bulb includes a lamp base, a light-transmitting bulb shell, a driving power supply, electric lead wires, a stem, at least one LED light source and a support column, wherein the tail of the light-transmitting bulb shell is fixedly connected with the lamp base; the driving power supply is located in the lamp base, and the LED light sources and the support column are wrapped in an inner cavity of the light-transmitting bulb shell; the light-transmitting bulb shell is sealed by the lower portion of the stem which is of a hollow structure, an exhaust pipe is arranged in the stem, and a hole is formed in the joint of the upper end of the exhaust pipe and the stem. The multifunctional LED bulb looks like ordinary incandescent bulbs, and is environmentally friendly, good in heat dissipation and light-emitting effect.

There is provided a lighting device (100) comprising a housing comprising a frangible light exit window (110) and a fitting (120) including a first electrical connector (122) inside said housing. Within the housing there is a carrier assembly (130) comprising a plurality of SSL elements (132), and a second electrical connector (134) in contact with the first electrical connector (122). The second electrical connector (134) is held in contact with the first electrical connector (122) by the light exit window (110). This lighting device is relatively safe as if the light exit window (110) breaks the electrical components of the carrier assembly (130) may not be live.

The invention relates to a waterproof lighting element, wherein the lighting element comprises a printed circuit board with an aluminum substrate layer. The invention relates also to a waterproof lighting element, wherein the lighting element comprises a printed circuit board with a base plate. The invention relates also to a method of manufacturing a waterproof lighting element.

An LED lamp and a power supply module thereof are provided. The power supply module includes a driving circuit, a OVP circuit, and an impedance detection circuit. The OVP circuit is configured to determine whether an OVP condition is detected by sampling the driving signal, and the impedance detection circuit is configured to determine whether a user touching state is detected. When either the OVP condition or the user touching state is detected, the power switch of the driving circuit will be controlled to limit the amount of a current flowing through the power switch. In addition, the impedance detection circuit could detect the user touching state by comparing signals with a defined level sampled during each pulse, thus enhancing the detection accuracy.

An LED tube lamp comprises an LED module for emitting light; and a ballast interface circuit coupled to the LED module and comprising a thyristor device configured to determine whether an input external driving signal is a high frequency or high voltage signal. When the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light, and specifically the thyristor device is configured to conduct current upon the external driving signal being input. The ballast interface circuit further comprises a transistor, an inductor, and a resistor connected to each other; and the inductor is coupled between a terminal of the thyristor device and the LED module. Upon the thyristor device being turned on a current flowing through the inductor and the transistor maintains the conduction state of the thyristor device.

An LED tube lamp comprises an LED module for emitting light; a rectifying circuit for rectifying an input external driving signal to produce a rectified signal; and a ballast interface circuit coupled to the LED module and comprising a detection circuit configured to determine that the external driving signal is a high frequency or high voltage signal when the voltage level of the rectified signal is higher than a predefined first threshold level. The ballast interface circuit causes an open circuit for the LED module when the voltage level of the rectified signal is higher than a predefined second threshold level but lower than the predefined first threshold level. And the ballast interface circuit causes current conduction in the LED module when the voltage level of the rectified signal, as based on an external driving signal from an inductive ballast, is lower than the predefined second threshold level.

Operating room monoreflector light includes a dome or hood-shaped upper housing portion and a lighting means arranged in the upper housing portion, preferably as an LED lighting means, including an LED board on which a plurality of LEDs are arranged. A main reflector is arranged in the upper housing portion and deflects a light flux produced by the lighting means through a light exit opening closed by a cover plate of the upper housing portion. To reduce the necessary installation space and to simplify the construction, the upper housing portion is in one piece and extends interruption-free from an upper end which is directed upwardly in the installation position to a lower end which defines the light exit opening. The upper housing portion includes a fixing plane for the LED board, and on which an LED light module is or can be mounted.

An LED tube lamp with overvoltage protection capability is provided. The LED tube lamp includes a lamp tube, two external connection terminals, a rectifying circuit, a filtering circuit, an LED module, and a protection circuit. The protection circuit is coupled between two input terminals of the LED module and configured to perform overvoltage protection when determining that a voltage level between the two input terminals of the LED module reaches or is higher than a predefined voltage value, wherein the protection circuit includes a diode and the predefined voltage value is in a range of about 40V to about 600V.

An LED tube lamp includes a glass lamp tube, two end caps, an LED light strip, a power supply, and a reflective film. At least a portion of an inner surface of the glass lamp tube is formed with a rough surface, and the roughness of the rough surface is higher than that of the outer surface. The glass lamp tube includes a main body region and two rear end regions, each of the two rear end regions coupled to a respective end of the main body region and each of the two end caps coupled to a respective rear end region. A length of the light strip is longer than the length of a main body region of the glass lamp tube. Each of the two end caps is coupled to a respective end of the glass lamp tube by a gel. The LED light strip is disposed on an inner surface of the glass lamp tube with a plurality of LED light sources mounted on the LED light strip.