Inputs

Connected lighting load W Enter a numeric project value in W at or above 0.01. Baseline operating hours h/day Enter a numeric project value in h/day between 0 and 24. Occupied hours h/day Enter a numeric project value in h/day between 0 and 24. Operating days per year days Enter a numeric project value in days between 1 and 366. Control effectiveness % Enter a numeric project value in % between 0 and 100. Tariff $/kWh Enter a numeric project value in $/kWh at or above 0. NCC/jurisdiction context Choose the option that best matches the project condition.

Baseline annual energy -- kWh

Controlled hours per day -- h/day

Controlled annual energy -- kWh

Annual energy savings -- kWh

Assumption note --

Calculation details

Baseline annual energy: -- kWh
Controlled hours per day: -- h/day
Controlled annual energy: -- kWh
Annual energy savings: -- kWh
Annual cost savings: -- $
Context review required: --
Assumption note: --

Important notes

Tariff, schedule, occupancy, commissioning, and override assumptions are dated estimates.
NCC/jurisdiction context is required for project review; savings output is not a compliance statement.

Formulas

$\displaystyle kWh = \frac{W \times h \times d}{1000}$
$\displaystyle h_{\mathrm{controlled}} = h_{\mathrm{baseline}} - (h_{\mathrm{baseline}} - h_{\mathrm{occupied}})\eta$

Estimate annual lighting energy and cost savings from occupancy control assumptions.

Occupancy Lighting Control Savings 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.

Inputs

Results

Formulas

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