What does the light bulb 150w mean?

The power of the light bulb is 150 watt. The light bulb 150W indicates that the light bulb power is 150W. "W" in "bulb 150W" stands for Watt and is the unit of electric power. In physics, watt is a unit for measuring electric power, representing the energy consumed or generated every second. When it comes to the power of light bulbs, it actually refers to the electric energy consumed by light bulbs every second. So "light bulb 150W" is the power consumption per second of this light bulb150J. Of course, this also means that 150×3600 joules of electricity are consumed every hour, because 1 hour has 3600 seconds.