Results
Enter inputs above, then tap Calculate.
Method and assumptions
Constant-power approximation - include temperature and end-of-life factors per AS/NZS 2293.
Emergency lighting battery
Estimate battery capacity for the lighting load and required duration.
Battery capacity estimate. Does not validate luminaire photometry, spacing, discharge characteristics or emergency-lighting compliance.
Related calculators
Check the stated method and limits against your installation. Results are calculation aids, not certification.
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Calculation model 2026-11-02.1