Efficiency is the comparison of the amount of light (lumens ... of an incandescent bulb. Warm-up time is how long the bulb took to reach near full brightness. Bulbs that take 0 to 15 seconds ...

For example, on the low end of the spectrum would be the warm glow of a lit ... a light consumes) and the lumens (which measure how bright a light is). Light bulb boxes may include many numbers ...

Efficiency is the comparison of the amount of light (lumens ... of an incandescent bulb. Warm-up time is how long the bulb took to reach near full brightness. Bulbs that take 0 to 15 seconds ...