Buy 5W Syska LED Bulb @ Rs 550 Buy 12W LED Bulbs (Set of 4) @ Rs 445 Buy 15W LED Bulb @ Rs 299 Using the conversion chart above find your LED equivalent bulb which gives the same amount of brightness.

It works by passing an electric current through a filament in a vacuum bulb, causing the filament to heat and glow. The LED, invented by Nick Holonyak Jr. in 1962, is a bit more complicated.