Watts To Lumens Calculator
Estimate luminous flux (lumens) from power (watts) for a specified light source type using luminous efficacy values. Use it to test different inputs quickly, compare outcomes, and understand the main factors behind the result before moving on to related tools or deeper guidance.
Last updated
Formula
Luminous flux (lm) = Power (W) × Efficacy (lm/W)
Result
1,000 lm
10 W with LED (100 lm/W) produces 1,000 lumens.
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