LED Lighting Retrofit ROI
Calculate ROI on retrofitting workshop / depot / yard lighting from fluorescent/HID to LED
Formula: retrofit_total_cost = fixture_count * retrofit_cost_per_fixture; annual_kwh_saved = fixture_count * (watts_old_per_fixture - watts_led_per_fixture) / 1000 * hours_per_day * days_per_year; annual_cost_saving = fixture_count * (watts_old_per_fixture - watts_led_per_fixture) / 1000 * hours_per_day * days_per_year * electricity_aed_per_kwh; payback_years = (fixture_count * retrofit_cost_per_fixture) / max(fixture_count * (watts_old_per_fixture - watts_led_per_fixture) / 1000 * hours_per_day * days_per_year * electricity_aed_per_kwh, 1)
Calculate ROI on retrofitting workshop / depot / yard lighting from fluorescent/HID to LED.
Inputs
Results
Warnings & checks
- ⚠Show warning when configured threshold is crossed
Recommended next actions
- →Review the result against your operational targets
Formula
retrofit_total_cost = fixture_count * retrofit_cost_per_fixture; annual_kwh_saved = fixture_count * (watts_old_per_fixture - watts_led_per_fixture) / 1000 * hours_per_day * days_per_year; annual_cost_saving = fixture_count * (watts_old_per_fixture - watts_led_per_fixture) / 1000 * hours_per_day * days_per_year * electricity_aed_per_kwh; payback_years = (fixture_count * retrofit_cost_per_fixture) / max(fixture_count * (watts_old_per_fixture - watts_led_per_fixture) / 1000 * hours_per_day * days_per_year * electricity_aed_per_kwh, 1)Use for estimation. Verify safety-critical calculations with qualified review.