A mode switching circuit is configured to change a signal path in a light-emitting diode (LED) tube lamp and comprises: at least one switch, configured to receive a filtered signal as a driving signal to drive an LED module in the LED tube lamp to emit light, and when a frequency of an external driving signal received by the LED tube lamp is higher than a mode switching frequency, output the driving signal to the LED module. The LED tube lamp comprises an auxiliary power module coupled to provide auxiliary power for the LED module to emit light; and the mode switching circuit is on a printed circuit board and is electrically connected to the LED module on a bendable circuit sheet in the LED tube lamp, wherein the bendable circuit sheet is disposed below the printed circuit board to be electrically connected to the printed circuit board by soldering.

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.

A recessed downlight fixture and method for installation is provided. The recessed downlight fixture can be installed in a retrofit application, after a ceiling is installed, through a pre-existing opening in that ceiling. Alternatively, a recessed downlight fixture according to a second embodiment can be installed before a ceiling is present. In either embodiment, the light source coupled to, for example, a heat sink, can be universally moved in three degrees of movement, rotationally, along a tilt axis, or further within the ceiling to increase or decrease the recess. All such universal adjustments can take place through and below the ceiling opening during or after installation.

Examples of the present disclosure are related to systems and methods for lighting fixtures. More particularly, embodiments disclose lighting fixtures having a substrate with one or more light sources embedded on the bottom surface of the substrate and at least one panel extending along the sides of the substrate.

A frame lamp includes a bottom casing, a top casing, an illuminating component and a plug. The bottom casing has a plate form and has a cavity disposed therein. The top casing detachably engages with the bottom casing. The top casing includes a frame-shaped light transmitting component and a transparent decoration plate. The frame-shaped light transmitting component forms a window in its middle. The transparent decoration plate fits the window. The illuminating component is disposed within the cavity. The window allows light emission from the illuminating component within an emission area defined by the window. The plug extends across the bottom casing. Also, the plug is electrically coupled to the illuminating component. In addition, the plug relays power to the illuminating component while being electrically coupled to an external power source.

Examples of the present disclosure are related to systems and methods for lighting fixtures. More particularly, embodiments disclose lighting fixtures utilizing metal core PCB (MCPCB) for thermal, mechanical, and/or optical controls.

A lens structure for placement over a light source and for attachment to a circuit board around the light source includes a circuit board engagement portion for being placed towards the circuit board, a recess provided in the circuit board engagement portion for receiving the light source upon attachment of the lens structure to the circuit board, a light entry surface around the recess, a lens body, a light exit surface distal from the circuit board engagement portion, and an attachment structure, the attachment structure being partially molded into the lens body and partially extending from the lens body for attaching the lens structure to the circuit board.

A waveguide body comprises a length from a first end to a second end along a longitudinal axis, and a coupling portion that comprises first and second coupling surfaces. The first and second coupling surfaces define, at least in part, an elongate coupling cavity along the entire length of the waveguide body and a surface located opposite the coupling cavity. The waveguide body further comprises first and second opposed sections extending along the length of the waveguide body. The first and second opposed sections further comprise respective first and second lower surfaces disposed at different first and second side section angles with respect to a first axis lying in a plane normal to the longitudinal axis. The first axis bisects the coupling portion. Among other things, such a waveguide may be included in a luminaire along with a light source.

A lamp, a light emitting module, and a combined lens thereof are provided. The combined lens includes a first lens portion and a second lens portion. The first lens portion has a surrounding lateral surface, an incident surface arranged inside of the surrounding lateral surface, and an exit surface opposite to the incident surface. The second lens portion includes a light diffusion surface and a light output surface. The light diffusion surface is spaced apart from and face toward the exit surface, and has a plurality of light diffusion microstructures that are arranged on a projection region defined by orthogonally projecting the exit surface onto the light diffusion surface. The combined lens is configured to guide light therein to travel out through the light output surface by passing through the exit surface and the light diffusion microstructures.

Examples of the present disclosure are related to systems and methods for lighting fixtures. More particularly, embodiments disclose directly embedded a smart module with a lighting fixture utilizing metal core PCB (MCPCB).