Question

A 25-foot width by 35-foot length office is illuminated at fifty-five footcandles by twelve 3-lamp

fluorescent light fixtures. Each lamp is rated at 37 watts which includes the ballast load. If these

office lights will be on an average of 2500 hours per year and the commercial utility bill including

demand charges is an average of $0.09/kWh, what is the annual utility bill for this lighting

configuration?

Answer 1

Date/ na yeAY s na Yea 3330X001