How does the light output of led lights compare to regular lights?

LED light have a much higher light output per watt: luminous efficacy (lm/W). Incandescent lights have luminous efficacy ranging from 14 to 18 lm/W, whereas LED lights have a typical efficacy of 100 lm/W at high outputs. It means that a LED lamp of only 1/6 the watt rating can replace incandescent light bulbs.