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Lighting Wall-Plug Efficiency Calculator

Lighting Wall-Plug Efficiency reports wall-plug efficiency from one operating case.

Enter values for wall-plug efficiency

Use one consistent electrical operating case for all fields.

W

Enter visible optical power in W.

W

Enter electrical input power in W.

How Lighting Wall-Plug Efficiency works

For Lighting Wall-Plug Efficiency, use efficiency = optical ÷ electrical × 100. Lighting Wall-Plug Efficiency uses Visible optical power, Electrical input power to report Wall-plug efficiency. Luminous intensity belongs in the separate Candela Lumens worksheet.

With the loaded values, wall-plug efficiency evaluates to 28.00%. Test visible optical power separately and preserve the baseline wall-plug efficiency.

Inputs for Lighting Wall-Plug Efficiency

Visible optical power and Electrical input power belong to Lighting Wall-Plug Efficiency. Keep source units with visible optical power.

The Lighting Wall-Plug Efficiency defaults demonstrate arithmetic only. Replace visible optical power with case-specific data.

Visible optical power
Example entry: 28 W.
Electrical input power
Example entry: 100 W.

Reading the Lighting Wall-Plug Efficiency result

This output represents Lighting Wall-Plug Efficiency.

Before selecting equipment for Lighting Wall-Plug Efficiency, compare wall-plug efficiency with available ratings and operating limits. For total leds, use LED Array Configuration Calculator.

Measurement and units

Photometric results depend on fixture distribution, reflectance, mounting, maintenance, and the measured task plane. Check prefixes on visible optical power. Annual lighting cost can be checked in Lighting Energy Cost Calculator.

Keep the visible optical power unit and measurement point consistent across Lighting Wall-Plug Efficiency cases.

Limits of this calculation

This is not the same as luminous efficacy.

Only the listed Lighting Wall-Plug Efficiency inputs contribute to wall-plug efficiency. Unentered effects remain outside Lighting Wall-Plug Efficiency.

A useful Lighting Wall-Plug Efficiency comparison

Record wall-plug efficiency before testing a different visible optical power value.

Document the alternate visible optical power source. Use Inverse Square Lighting Calculator to a separate illuminance calculation.

Questions about Lighting Wall-Plug Efficiency

What does Lighting Wall-Plug Efficiency calculate?

Lighting Wall-Plug Efficiency reports wall-plug efficiency.

Can Visible optical power be zero?

For Lighting Wall-Plug Efficiency, measure any zero visible optical power directly.