Energy efficient lighting greatly reduces the demand for electricity and its associated environmental impacts. The compact fluorescent lamp is a high efficiency alternative with a long life in continuous service. This paper examines the impact of on/off cycling on compact fluorescent lamp life. Experimental data and manufacturers’ ratings determine a linear life function that includes both lamps’ run times and on/off cycling. The paper develops economic cost functions and a maximum benefit optimization formulation to examine how lamp cycling and run time affects potential savings. Numerical examples test the formulation using various combinations of energy costs, lamp purchase prices, and on/off cycling.
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