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


Simple Comparison Options
(Not photometric)         

Original
Restore
Defaults

LED
LPD (Lighting Power Density)
 SqFt / Fixture =  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.
Watt  & 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 Contact me with any comments regarding this calculator.