Gas City Light Test
8- LED light fixtures were installed on 1-20-2007 to replace 8 - 400 Metal Halide fixtures. Watt hour meters were installed to track the usage.
One meter was installed to track 4- 400 Watt metal halide fixtures on the gas canopy and the other meter was installed to track the usage of the four HTS-6 LED fixtures. 10 months have passed.
The results are as follows:
| Four 400 watt metal halides | Four LED fixtures |
| 6610 KWH | 832 KWH |
| 6610 x .085 = $561.85 | 832 x .085 = $70.72 |
Electric rates are calculated on the current electric rate of .085 per KWH .
| Each 400 watt metal halide cost $14.05 per month to operate. | Each LED fixture cost $1.77 per month to operate. |
| 64 fixtures cost $928.00 per month or $11,136.00 per year. | 64 LED's cost $113.28 per month or $1359.36 per year. |
The system would pay for itself in 2.7 years.
With a 100% usable life span of 11.6 years.
This is assuming the electric rates do not change and we are not calculating any depreciation.
Thank you for allowing us to use your station as a test site.
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