Energy Cost

Lighting Annual kWh Calculator

Estimate annual lighting electricity use from fixture count, connected watts, operating schedule, and control factor.

Lighting calculator Energy Cost Updated August 26, 2026

Inputs

Results

Connected load -- W
Adjusted annual hours -- h/year
Annual electricity use -- kWh/year
Control factor -- %
Calculation details
Connected load
-- W
Adjusted annual hours
-- h/year
Annual electricity use
-- kWh/year
Control factor
-- %
Important notes
  • Use measured load, actual controls behavior, commissioning records, and dated schedule assumptions where available.
  • Energy calculations do not determine electrical safety, NCC outcomes, tariff eligibility, or Australian compliance.

Formulas

  • \(\displaystyle P = n \times W\)
  • \(\displaystyle E = P \times h_{\mathrm{day}} \times d_{\mathrm{year}} \times f_{\mathrm{control}} / 1000\)
  • This is an energy estimate using the user-stated schedule and control assumption.

Estimate annual lighting electricity use from fixture count, connected watts, operating schedule, and control factor.

Lighting Annual kWh Calculator is a planning aid. Keep the target source, product data, measurement method, and project assumptions with the result. Confirm compliance, installation, certification, and safety decisions with the responsible professional.