List the marits of LED bulbs.

Explanation

Merits of LED bulb:
(i) As there is no filament , there is no loss of energy in the form of heat. It is cooler than the incandescent bulb.
(iii) In comparison with the flurescent light, the LED bulbs have significantly low power requirement.
(iii) It is not harmful to the environment.
(iv) A wide range of colours is possible here.
(v) It is cost-efficient and energy efficient.
(vi) Mercury and other toxic materials are not required.