Like all light bulbs, LED lights produce light by converting a given amount of electric current into light. LEDs perform this conversion more efficiently than standard incandescent bulbs. According to the US Department of Energy, a typical Energy Star-rated LED uses 20 to 25% of the energy that an incandescent bulb uses.
The amount of light a bulb generates is measured in a unit called lumens, and electrical power is measured in a unit called watts. Due to their methodology of converting electricity into light, LED bulbs feature a higher ratio of lumens to watts than incandescent bulbs.
You can use this chart to get the brightness of your LED lights right. The brightness of today?s bulbs is measured in lumens (lm). Lumens measure the amount of light a bulb produces, unlike watts, which measure power consumption.
Watts vs Lumens
40 = 450
60 = 800
75 = 1100
100 = 1600
150 = 2600