Light Source Types & Luminous Efficiency Explained

The type of light source refers to the technology or device used to emit light, such as incandescent bulbs, fluorescent lamps, LED lights, and halogen lamps. Luminous efficiency is a measure of how effectively a light source converts electrical power into visible light. It is expressed as the ratio of luminous flux (visible light emitted) to the electrical power input. Higher luminous efficiency means more visible light is produced per unit of power consumed, indicating greater energy efficiency. LEDs have high luminous efficiency, typically exceeding 100 lumens per watt, making them a popular choice for energy-efficient lighting.