Lighting Implementation Guide

 
 
 
 
 
 

Lighting Savings Calculator Tool

 

Use this tool to calculate energy and financial savings from your lighting project.

 
Items marked with a Required Field are required

Start calculating savings here

 

Project Name

(i.e Replace lights in lobby)

Electricity price Required Field

p/kwh (enter average electricity unit price - see note below)

Site occupation Required Field

Days per week
 

To lighting details page

 
Note on electricity Price
For 24 hour operation enter the average unit price you pay across day and night rates. For day time operation only, just enter anytime rate. Typical rates for business are 3p-6p per unit (kWh). Your unit price can be found on your bill

Discount Rate:
Enter the discount rate that your company uses to assess the value of projects – this is usually based on your company’s cost of capital – i.e. the rate of interest that would be paid on any capital raised to pay for the project.


NPV:
The Net Present Value (NPV) of your project is the amount in present day terms that your project is worth today given the future cash flows projected and the discount rate used. A positive NPV indicates a profitable project over the lifespan of the investment.


Payback Period:
The payback period is the elapsed time taken for the positive cash flows from your project to equal the initial up front cost. This is a crude measure of the risk of your project.