Inputs

Old lamp life h Enter a numeric project value in h at or above 1. New lamp life h Enter a numeric project value in h at or above 1. Annual operating hours h/year Enter a numeric project value in h/year at or above 0. Fixture count Enter a numeric project value at or above 1. Lamp cost $ Enter a numeric project value in $ at or above 0. Labour cost per replacement $ Enter a numeric project value in $ at or above 0. Access cost per year/event $ Enter a numeric project value in $ at or above 0.

Old annual replacements --

New annual replacements --

Annual replacements avoided --

Annual maintenance savings -- $/year

Savings status --

Calculation details

Old annual replacements: --
New annual replacements: --
Annual replacements avoided: --
Annual maintenance savings: -- $/year
Savings status: --

Important notes

Maintenance savings use dated cost assumptions and are not financial advice.

Formulas

$\displaystyle R = nH/L$
$\displaystyle S = (R_o-R_n)(C_l+C_w)+C_a$

Estimate annual replacement reduction and maintenance savings from old and new lamp life assumptions.

Lighting Maintenance 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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