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Lighting ROI Calculator


Find Payback
from costs & interest
with LED Lighting

This calculator gives payback time, and both the annual and life-time cost & savings figures for energy and maintenance.  Graphics quickly illustrate financial relationships which may apply to Carbon Credits and LEED.
 Cookie Jar        Comparisons      Show CO2 by Fuel Type*      Show LPD 

 Select Enter Power Factor (PF) ≥ 95 for residential.
  Compare values during this  year LED life 
LED 
Original 
Savings 
Return 
  Cookie Jar  
 


Fuel:  Coal   Petroleum
Natural Gas   Hydro   Nuclear
CO2 Reduction from original by
lower power consumption.
 
 
Metric Tons Less / year
Metric Tons Less / lifetime
Simple Comparisons
(Not photometric)

Original
Restore
Defaults

LED
 
LPD (Lighting Power Density)
 sqFt/Fixture = sqFt Total
Target LPD =  fixtures  
LPD Statistics    W/SqFt  
Original LPD  
new  LED LPD  
= Saved  


See Table 1 Here
 Details
Power (W), Power Factor%, Quantity & Costs
Original Light: LED: System:
Cost: $ea.
W  & PF
Power:  W
$ea.
W
 W
Interest: 
Quantity:
Electricity: $/kWh
Annual Time ON:   hours
Hours/Day ×  Days/Wk ×  Weeks/Year
Annual Electricity Cost: Original
$
 LED
$
 Annual Results
Savings: $   (%)
Annual ROI: 
Investment ÷ Savings
= $ ÷ $
 Year Payback 
Simple ROI %
 LED Investment
 LED Life  Hours =  Years Lifetime saves $
 LED Maintenance Interval:  Years @ $ per visit. 
     [Lifetime ÷ Maint. Interval × Maint. Cost × Quan.] = $
 ($ × ) + $ = $ 
   + fixed job costs $  = $ Investment
 Original fixture with lifetime maintenance and energy costs
 Lamp life  Hours ÷  Hours/Year  Years Lifetime
 LED Project Years × $ original annual energy = $
 Maintenance = $(relamping, disposal, etc. every  years)
 Original Cost with repair  times during LED Lifetime:
    $ + $ energy = $
*US national average CO2 emissions caused by various power fuels.
(provided by the US EPA)
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Please Email me with any comments regarding this calculator.