They are less energy efficient than CFL and LED bulb ... light. A bulb with a high Kelvin rating produces a whiter light, while a bulb with a lower Kelvin rating produces a warmer white.

LED light bulbs are not generally labeled as “warm ... “daylight” is cool (despite sounding sunny); “soft white” is warm (despite sounding pale)—and a color temperature, which ...

Understanding lumens LED bulb brightness is measured in lumens ... you can tweak the tone—the temperature—of white light from warm and cozy to cooler and more energizing.