| RETAIL: New Installation Comparison |
90 PAR/FL Halogen |
70W T4.5 Metal Halide |
| LAYOUT |
Fixture Mounting Height |
12 ft. |
12 ft. |
| LAMP & FIXTURE DATA |
Initial lamp lumens |
1310 |
6600 |
| Number of lamps |
1 |
1 |
| Initial fixture lumens |
1310 |
6600 |
| Ballast factor |
N/A |
1.00 |
Initial fixture lumens
(ballast corrected) |
1310 |
6600 |
| Lamp lumen depreciation |
0.00 |
0.80 |
| Luminaire dirt depreciation |
0.88 |
0.88 |
| Fixture efficiency (%) |
100 |
52.5 |
| Maintained fixture lumens |
1310 |
2439 |
| Fixture watts |
90 |
77 |
| Fixture lumens/watt |
14.6 |
32 |
| FOOTCANDLES |
CRI |
100 |
83 |
| FC Average Maintained |
40 |
39 |
| OPERATING DATA |
Number of fixtures |
480 |
180 |
| Cost/kWh |
$0.085 |
$0.085 |
| Total wattage |
43200 |
13860 |
| Square footage |
12800 |
12800 |
| Total installed price |
$28,440 |
$39,600 |
| Watts/square foot |
3.38 |
1.08 |
| Annual operating hours |
5110 |
5110 |
| SAVINGS ANALYSIS |
Annual Energy Costs |
$18,764 |
$6,020 |
| Annual Energy Savings |
N/A |
$12,744 |
| COMMERCIAL BUILDINGS DEDUCTION |
Lighted area (square feet) |
12800 |
12800 |
ASHRAE/IES Standard 90.1-2001 requirement
(watts/square foot) |
1.9 |
1.9 |
| LPD below Standard 90.1-2001 |
0% |
43% |
| Eligible deduction per square foot |
$0.00 |
$0.60 |
Max. Commercial Buildings Deduction
(final benefit
depends on owner’s
tax rate) |
$0.00 |
$7,680 |
| CONTROLS |
Mandatory controls (see Standard 90.1-2001) and mandatory bi-level
switching (see Commercial Buildings Deduction) can increase energy savings. |
