Annual energy cost
savings: $23,082
Number of watts
reduced: 47,040
Payback less than 3 years
Case Study – School
OptiMize: Wrap Fixture Replacement
Midwest High School Lighting Retrofit
- Existing Fixtures: Hallways / Classrooms
- 3 Lamp wrap fixture with T12/40w lamps and magnetic ballasts
- Total watts per fixture: 129
- Number of fixtures: 672
- Total watts used: 86,688
Annual energy costs: $43,864
Replacement Outcome:
- Two lamp 32w T8 3,000 lumens with electronic high efficiency ballast normal power
- Envirobrite FWN2402T832ENVMVTL12S-L08P8A
- Total watts per fixture: 59 watts
- Number of fixtures: 672
- Total watts used: 39,648
New annual energy costs: $20,062
Energy Savings Analysis:
- Luminaires operating 10 hours per day, five days a week, 46 weeks
a year.
- Watts saved: 47,040
- Energy Costs: $.22 per kWh
Dollars saved: $23,802 annually
This does not include the additional savings through installation of motion sensors and wireless controlled RF devices.
Replacement Cost:
- Ballast: $16.00
- Lamps: $1.98 x 2 = $3.96
- Cost per fixture: $98.95
- Labor Installation cost: $10.35
- Total cost per fixture installed: $109.30
- Total replacement cost: $73,449
- Simple payback: 36 months (this does not factor any rebate or tax deduction provided via the Energy Policy act of 2005. Actual payback period would be less than 3 years.)
- Carbon footprint reduction is equivalent to removing 11 cars off the road annually.
