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Lumens to Watts Calculator
Convert brightness (lumens) into power consumption (watts) across bulb technologies
Conversion Formula: $\text{Watts} = \frac{\text{Lumens}}{\text{Luminous Efficacy (Lumens/Watt)}}$. Enter your desired brightness below.
Brightness & Bulb Type Input
Calculation Results
⚠️ Lumens measure actual light output (brightness), while watts measure electricity consumption. LEDs produce the same brightness using significantly fewer watts.