Color and Brightness
Light color is measured on a temperature scale referred to as Kelvin (K). Lower Kelvin numbers mean the light appears more yellow; higher Kelvin numbers mean the light is whiter or bluer. Most ENERGY STAR certified bulbs are made to match the color of incandescent bulbs at 2700-3000K. For a whiter light, look for bulbs marked 3500-4100K. For bluer white light, look for bulbs marked 5000-6500K.
|Amber Light (2200K-2500K)||Soft White (2700K)||Warm White (3000K)||Cool White (3500K-4100K)||Daylight (5000K-6500K)|
Choosing the Right Brightness
While the brightness of incandescent bulbs is measured in watts, LEDs are measured in lumens. This is because LEDs use less energy and, therefore, have a lower watt rating. ENERGY STAR certified bulbs provide the same brightness (lumens) with less energy (watts). Use this chart to determine how many lumens you need to match the brightness of your old standard bulbs.