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Watts to Lumens Calculation — ChiefEngineer.in

Worked step-by-step example. Convert electrical power to luminous flux using luminous efficacy. Open interactive calculator →

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Result

Lumens
1000 lm

Formula

Φv = P × ηv

Variables

  • P — power (W)
  • ηv — efficacy (lm/W)

Worked Example

Input: 10 W, 100 lm/W

Result: Φ = 1000 lm

Assumptions & Notes

Efficacy varies by source and operating conditions.

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