燈泡w的意思

"W" in a light bulb context typically stands for "wattage." Wattage is a measure of the power consumed by the light bulb. A higher wattage generally means the bulb will be brighter, but it also consumes more energy. However, with the advent of energy-efficient bulbs like LEDs and CFLs, wattage is no longer the sole indicator of brightness, as these bulbs can produce the same amount of light (measured in lumens) with much lower wattages than traditional incandescent bulbs.