Choose between warm and cool light.
20w led equivalent to incandescent.
Watts chart below to shop for the right light bulb for your space.
For example if you typically purchase 60w incandescent bulbs which produce about 700 800 lumens consider purchasing a lower energy alternative like a 42w halogen bulb 12w cfl or even a 10w led bulb to achieve the same brightness.
Read the package to choose desired illumination level.
Since most household bulbs are 40w 60w 75w or 100w you may be able to memorize their equivalent lumens.
For example a 3w led is equivalent in output to a 45 w incandescent.
However because lumens per watt vary for both incandescent and led lights it s easier to use a wattage to lumens comparison chart.
In general a simple rule to follow to replace an incandescent with an equivalent in light output cfl bulb is to select the cfl bulb that has 1 4 watts compared with the replaced incandescent bulb.
Led bulbs require much less wattage than cfl or incandescent light bulbs which is why leds are more energy efficient and longer lasting than their competitors.
For example a correct replacement for a 60w incandescent bulb would be a 15 watt cfl bulb 60 1 4 15.