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Lighting Load and Circuit Estimate

Estimate single-phase-equivalent lighting load, apparent load, current, and an arithmetic circuit count from user-entered luminaire input data.

Inputs

Lighting load

Range: 1–100,000

Count each luminaire or fitting connected to the lighting circuit schedule.

Range: 0–10,000 W

Use the luminaire's electrical input wattage, including driver or control-gear losses where they are not already included in the datasheet value. Do not use LED chip wattage.

Range: 1–1,000 V

Use the phase-to-neutral voltage for this single-phase-equivalent estimate. Australian nominal examples are 230 V or 240 V; this field does not select a three-phase formula.

Range: 0.01–1

Use the operating power factor of the lighting load. A lower value increases the apparent current for the same real wattage.

Range: 0.01–1,000 A

Enter the current limit you want to use for arithmetic circuit splitting. This is not a breaker rating, cable capacity, diversity factor, or Australian compliance limit.

Result

Estimated apparent lighting load (VA)
600.0
Estimated supply current (A)
2.61
Circuits at the entered current limit
1.00
Connected lighting load (W)
600.0

Formula

Calculation logic

Formula definitions and substituted values.

Before relying on the result

  • Estimate lighting load from luminaire quantity and driver input wattage
  • Estimate circuit count from a user-provided per-circuit current limit
  • Use the estimate to prepare a preliminary lighting circuit schedule, then verify the applicable design requirements and product data.

Related calculators

Use the estimate to prepare a preliminary lighting circuit schedule, then verify the applicable design requirements and product data.