What Is A Lighting Retrofit?
A lighting retrofit is when you replace components in the system with counterparts which make it use energy more efficiently. A lighting upgrade is any strategy that reduces the system’s energy use. Energy savings are realized over time and can be significant enough to not only pay for the new equipment, but produce a return on the investment.
Understanding Energy Consumption:
Utilities bill their customers in several ways including an energy use charge, demand charge, power factor charge, fuel adjustment charge and other charges. Here is a look at Energy Consumption:
Energy Consumption (kWh) = Input Watts (kW) x Time (hours operated in a given year)
To reduce energy consumption we can do two things. Reduce the input wattage or reduce the hours of operation. Input wattage can be reduced by replacing lamps and ballasts with more-energy-efficient counterparts or by removing lamps and ballasts. The hours of operation can be reduced by using sophisticated controls and other methods.

