Final answer:
Solid state lighting is a technology that uses light emitting diodes (LEDs) as sources of illumination, providing energy efficiency and long lifespan, which makes it a prominent choice in modern lighting solutions.
Step-by-step explanation:
Solid state lighting refers to a type of lighting technology that utilizes light-emitting diodes (LEDs) as the source of illumination. This differs from other lighting technologies, such as incandescent bulbs, which produce light by heating a filament until it glows. Instead, LEDs create light using a semiconductor material that emits photons when an electric current passes through it, converting electrical energy directly into light energy without the need for a glowing filament. LEDs are known for their energy efficiency and long lifespan, which make them a popular choice for modern lighting applications.
Therefore, the correct answer is option 4) A type of lighting that uses light emitting diodes as sources of illumination. This lighting technology is becoming more prominent due to its energy efficiency and the phase-out of less efficient incandescent lamps. Solid state lighting with LEDs is now widely used for residential, commercial, and industrial lighting, contributing to significant energy savings worldwide.