sentences:  Light output decreases gradually over the lifetime of the LED (see Efficiency droop section).Some LED lamps are made to be a directly compatible drop-in replacement for incandescent or fluorescent lamps.LED lamp packaging may show the light output in lumens, the power consumption in watts, the color temperature in Kelvin or a colour description such as "warm white", "cool white" or "daylight", the operating temperature range, and sometimes the equivalent wattage of an incandescent lamp delivering the same output in lumens.