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LED Corridor Retrofit Payback Calculator
Corridor lights burn 24/7; LED retrofit has very fast payback.
Payback months
20.5
Annual savings
$1,393
Net investment
$2,375
How the math works
Savings = fixtures × watts saved × 8,760 / 1000 × rate. Fast payback at 24/7 burn.
25 × 53 × 8,760 / 1000 × $0.12 = $1,392/yr. Net $2,375. Payback 20.4 mo.
How to Use
- Enter corridor fixtures.
- Enter current watts.
- Enter LED watts.
- Enter electricity rate.
- Enter retrofit cost per fixture.
- Enter utility rebate.
- Read payback.
Frequently Asked Questions
Corridor lighting?
Multifamily corridor typical: 1 fixture per 15-30 ft of hallway. 200-unit building with 500 linear feet corridor: 17-33 fixtures. Burn hours: 24/7 (8,760 hours/year). Legacy: 2-lamp T8 fluorescent 60W, or 4-lamp 100W, or incandescent 100W. LED replacement: 18-30W typical. Savings: 60-75% energy reduction. High burn hours = fast payback (often <1 year).
Motion sensor integration?
Motion + daylight sensors: reduce from 24/7 full output to scheduled + motion-activated. Typical reduction: 40-60% beyond LED swap alone. Fixture cost: $50-150 premium for sensor. Lower part load: 10-20% of full wattage; full on when motion detected. Dimming: can reduce to 20-30% output vs zero (for safety visibility). Tenant experience: subtle, usually welcomed.
Emergency/egress lighting?
Corridor lighting is part of egress + emergency lighting. Code (NFPA, IBC): minimum illumination levels (1 foot-candle average, 0.1 min). Emergency lighting: battery-backup required, 90-minute test annually. LED retrofit: typically maintains or improves illumination. Code compliance: confirm new fixtures meet foot-candle requirements. Emergency illumination: integrate with battery backup or self-contained emergency LEDs.
Full retrofit scope?
Per-fixture: $75-200 LED kit OR $150-400 full fixture replacement. Sensor: $50-150 each add-on. Labor: $75-200/fixture. Emergency battery upgrade if needed: $100-300/fixture. Rebate: $30-100/fixture from utility. On 30-fixture corridor: $6-15k total cost, $2-4k annual savings, 1.5-4 year payback. Extreme-high-burn applications: <1 year payback common.
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