The lighting needs of a storage room are being met by six fluorescent light fixtures, each fixture containing four lamps rated at 60 w each. all the lamps are on during operating hours of the facility, which is 6 a. m. to 6 p. m., 365 days a year. the storage room is actually used for an average of 3 h a day. if the price of electricity is $0.11/kwh, determine the amount of energy and money that will be saved as a result of installing motion sensors. also, determine the simple payback period if the purchase price of the sensor is $32 and it takes 1 h to install it at a cost of $40.