Power LED; COB; white warm; 140°; 500mA; P: 5W; 300&divi

An LED (Light Emitting Diode) is an electronic component that converts electric current into light. The LED mentioned in this description is a Power LED with a nominal current of 500mA and a power of 5W.
COB stands for a type of LED that means "chip on board". This means that several LEDs are connected on top of one board, which results in a strong light flux.
The LED light is white in a warm tone with an angle of 140°, which means that the light beam spreads widely. "300&divi" likely refers to the LED's color temperature of 3000K, which is a warmer-toned white light similar to a sunset.