Lighting

Appliance	Typical Usage	$/month*	$/year
Snap-in Base (100 lights)	6 hrs/day	0.54	N/A
Large Screw Base (50 lights)	6 hrs/day	4.90	N/A
4' Fluorescent Tube
4-Lamp, T-12, 2 Magnetic Ballasts	10 hrs/day	4.46	53.61
4-Lamp, T-8, 1 Electronic Ballast	10 hrs/day	2.65	31.83
Exterior Flood Light
Incandescent 150 watt	10 hrs/day	3.49	41.88
High Pressure Sodium-35 watt	10 hrs/day	0.54	6.42
Interior Light Bulb
Incandescent 60 watt	10 hrs/day	1.40	16.75
15 Watt Compact Fluorescent (60 watt equiv)	10 hrs/day	0.35	4.19
Incandescent 75 watt	10 hrs/day	1.75	20.94
18 Watt Compact Fluorescent (75 watt equiv)	10 hrs/day	0.41	5.02
Incandescent 100 watt	10 hrs/day	2.32	27.92
27 Watt Compact Fluorescent (100 watt equiv)	10 hrs/day	0.63	7.54
Exterior Lighting (equivalent lighting levels)
Mercury Vapor 175 watt	10 hrs/day	4.59	55.08
High-Pressure Sodium 100 watt	10 hrs/day	2.68	32.16
Metal Halide 175 watt	10 hrs/day	3.29	39.48
Exterior Lighting (equivalent lighting levels)
Mecury Vapor 250 watt	10 hrs/day	10.33	123.93
High-Pressure Sodium 150 watt	10 hrs/day	6.89	82.62
Metal Halide 175 watt	10 hrs/day	4.90	58.75

*All estimated energy costs calculated at $0.0765/kWh

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