Evans Electrical Services Inc

RETROFIT PROGRAM

A retrofit is the practice of modifying the existing system, by replacing inefficient lamps and ballasts with more energy-efficient ones, adding reflectors and removing unnecessary lamps.If the existing fixtures with lighting layout is satisfactory, and if the existing components are in good shape, with good quality lenses and no parts that are cracked, yellowed or broken, it is generally preferable to retrofit. It is less expensive to retrofit the existing lamps and ballasts than to replace them with new ones.

Almost all lighting retrofits projects will pay for themselves within the first 3 years after installation.

Lighting Cost Reduction Example

Let's look at two purely fictitious lighting systems, A and B. Lighting System A is the existing system and Lighting System B is a proposed retrofit system which simply includes more-energy-efficient lamps and ballasts.

.	Lighting System A	Lighting System B
Watts Input for Each Fixture	175	100
Hours of Operation/Year	3,000	3,000
Energy Consumption/Year (Wh)	525,000 Wh	300,000Wh
1,000 to get kWh	525 kWh	300 kWh
Energy Savings/Year (kWh)	.	225 kWh
Utility Cost/kWh	$0.10	$0.10
Energy Savings each Fixture/Year ($)	.	$22.50
Number of Fixtures Retrofitted	100	100
Total energy savings/year ($)	.	$2,250.00