ROI Calculator

General Business Information
Application:
Number of working days per year:
Number of working hours per day:
Annual operating hours:
Price of kWh:

Energy Saving	Existing	Metrolight	Saving
Total number of luminaries:
Lamp wattage
Total load per luminary (lamp + ballast)
Daily power usage per luminary (wattage)
Total daily site load (monetary in $)

Dimming	Existing	Metrolight	Saving
Dimming
Dimmed hours per day
Daily power savings (wattage)
Daily power usage per luminaire inc. dimming (wattage)
Total annual energy cost per luminaire in $
Total annual energy consumption (kWh)
Total annual energy cost per site in $

Maintenance Costs in $	Existing	Metrolight	Saving
Effective lamp life in hours
Relamping cost per lamp incl. labor
Annual re-lamping cost

Total Savings
Total savings in $
Energy saving (in percentages)
Typical simple payback (before rebate)