Assertion: led | /r/HasProperty | friendly
Facets:
value: environmentally
type: DEGREE
Source sentences:
text: LEDs do not have moving parts and filaments that can easily be destroyed and fail; • operation of LED lighting systems can be controlled by digital controllers, ensuring maximum efficiency and high flexibility; • LED lighting devices are instantaneous, that is, do not require time to warm up or turn off; • unlike fluorescent lamps, LEDs do not contain mercury, and are also environmentally friendly; • most of the manufactured LED lighting fixtures not only meet the requirements of energy efficiency and environmental standards, but also often surpass them.