Convert lumens to watts for LED lighting
This lumens to watts LED converter helps you estimate the electrical power consumption of an LED light based on its luminous flux. Unlike incandescent or halogen bulbs, LEDs produce much more light for the same power, which is why a direct watt-to-watt comparison is misleading.
The conversion between lumens (lm) and watts (W) depends on the luminous efficiency of the LED, expressed in lumens per watt (lm/W). In this calculator, an average efficiency of 90 lm/W is used, which is representative of many modern household LED bulbs.
For example, a 9-watt LED lamp typically produces around 800 lumens, which corresponds to the brightness of an old 60-watt incandescent bulb. This makes lumens the most reliable unit for comparing brightness, while watts indicate energy consumption.
This tool performs all calculations locally in your browser. No data is sent to a server, and results are provided instantly. The values are indicative and may vary depending on LED quality, optical losses, color temperature and manufacturer specifications.