Finance and pricing, Advanced
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 = retrofit_total_cost / annual_cost_saving, when annual_cost_saving > 0
Calculate ROI on retrofitting workshop / depot / yard lighting from fluorescent/HID to LED.
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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 = retrofit_total_cost / annual_cost_saving, when annual_cost_saving > 0Use for estimation. Verify safety-critical calculations with qualified review.