Question

Why why CFL and LED lamps are energy efficient than normal lamps? pllzzz ans fast​

Answer 1

Answer:

LEDs emit very little heat. In contrast, incandescent bulbs release 90% of their energy as heat, CFLs release about 80% of their energy as heat, according to Energy.gov.

Another LED light benefit is that LEDs, because they emit light in a specific direction, do not need diffusers or reflectors that trap lights. This helps increase LED efficiency for uses such as downlights (recessed downlights are common in residential kitchens, hallways and bathrooms) or task lighting.

Answer 2

because in CFL bulbs and LED bulbs mercury vapour is filled.