A plant owner is considering replacing each of the metal halidelamps in his facility with a 6-lamp T8 fixture. The plant has atotal of 31 fixtures. Determine the annual energy savings for theproposed lighting upgrade (in kWh). Information about each lighttype is given below:
Metal Halides Each lamp is rated at 400 W with a ballast factorof 1.17. Lamp intensity is 22,000 lumens. Lamp lifetime is 20,000hours. The cost of a replacement lamp is $14, and the time requiredto replace a bulb is 27 minutes. The cost of the fixture is$26.
T8 Fluorescent Each lamp is rated at 32 W with a ballast factorof 0.91. Lamp intensity is 3,000 lumens. Lamp lifetime is 30,000hours. The cost of a replacement lamp is $2, and the time requiredto replace a bulb is 19 minutes. The cost of the fixture is$22.
Plant Information The plant operates for 7,967 hours per year.The labor rate is $15. The time required to retrofit an entirefixture is 38 minutes
