Lighting Upgrade Examples

HIDtoT8 Lighting Upgrade Examples
 
400 Watt Metal Halide (HID)
replaced by
6 Lamp T-8 Fluorescent Highbay
 
  400 Watt Metal Halide
6 Lamp T-8 Highbay
Watts/Fixture 465 214
Annual Operating Cost/Fixture $203 $93
Average Lumens* 15,210 18,727
Annual Savings/Fixture $110
Installed Cost/Fixture $218
Utility Rebate (est.) $125
Hours of Operation 10 hrs/day @ 6 days/week
Weekly (hr) 60
Annual (hr) 3,120
Annual Electric Savings % 54.0%
Payback Period (yr) 2.0
Return on Investment (ROI)
50.3%
Annual Savings for 100 Fixtures $10,964

* Although the initial lumen output of a metal halide fixture may be quite high, metal halide fixtures are known for their poor lumen maintenance. The average 400W metal halide emits only 65% of its initial lumens by the time it hits mean lamp life (40% of total life or 8000 hours) and as low as 40% of its initial lumens by the end of lamp life. Fluorescent lamps have superior lumen maintenance and maintain 90-94% of their initial lumens through the end of life.

 

T12toT8 Lighting Upgrade Examples
4 Lamp 2×4 T12 Fluorescent Fixture
replaced by
2 Lamp 2×4 T8 with Reflector
 
  4 Lamp T12 Fluorescent
2 Lamp T8 Retrofit
Watts/Fixture 184 60
Annual Operating Cost/Fixture $80 $26
Annual Savings/Fixture $54
Installed Cost/Fixture $64
Utility Rebate (est.) $20
Hours of Operation 10 hrs/day @ 6 days/week
Weekly (hr) 60
Annual (hr) 3,120
Annual Electric Savings % 67.4%
Payback Period (yr) 1.2
Return on Investment (ROI)
84.5%
Annual Savings for 100 Fixtures $5,416

 

T12toCREELED Lighting Upgrade Examples
4 Lamp 2×4 T12 Fixture
replaced by
2×4 LED Fixture
 
  4 Lamp T12
2×4 LED
Watts/Fixture 184 44
Annual Operating Cost/Fixture $226 $54
Annual Savings/Fixture $172
Installed Cost/Fixture $470
Utility Rebate (est.) $0
Hours of Operation 24 hrs/day @ 7 days/week
Weekly (hr) 168
Annual (hr) 8,760
Annual Electric Savings % 76.1%
Payback Period (yr) 2.7
Return on Investment (ROI)
36.5%
Annual Savings for 100 Fixtures $17,170

 

HIDtoLEDHighBay Lighting Upgrade Examples
400 Watt Metal Halide (HID)
replaced by
LED Highbay
  400 Watt Metal Halide LED Highbay
Watts/Fixture 465 160
Annual Operating Cost/Fixture $203 $196
Annual Savings/Fixture $374
Installed Cost/Fixture $1,040
Utility Rebate (est.) $150
Hours of Operation 24 hrs/day @ 7days/week
Weekly (hr) 168
Annual (hr) 8,760
Annual Electric Savings % 65.6%
Payback Period (yr) 2.8
Return on Investment (ROI)
36.0%
Annual Savings for 100 Fixtures $37,405

 

 

PAR38toPAR38LED Lighting Upgrade Examples
90W Par 38
replaced by
17W Par 38 LED
  90W Par 38
17W Par 38 LED
Watts/Fixture 90 17
Annual Operating Cost/Fixture $39 $7
Annual Savings/Fixture $32
Installed Cost/Fixture $49
Utility Rebate (est.) $20
Hours of Operation 10 hrs/day @ 6 days/week
Weekly (hr) 60
Annual (hr) 3,120
Annual Electric Savings % 81.1%
Payback Period (yr) 1.5
Return on Investment (ROI)
64.7%
Annual Savings for 100 Fixtures $3,189