The Sylvania Super Saver 75 W light uses 20 watts, produces 1280 lumens, and costs $4.49. As an alternative, a generic 75 W incandescent light bulb costs $0.40, produces 1200 lumens, and has a service life of 750 hours. Compare the performance of each light by calculating the efficacy for each light and estimate how much it would cost to run each light for 4 hours per day for 300 days in a year. Assume electricity costs 9 cents per kWh.

The Sylvania Super Saver 75 W light uses 20 watts, produces 1280 lumens, and costs $4.49. As an alternative, a generic 75 W incandescent light bulb costs $0.40, produces 1200 lumens, and has a service life of 750 hours. Compare the performance of each light by calculating the efficacy for each light and estimate how much it would cost to run each light for 4 hours per day for 300 days in a year. Assume electricity costs 9 cents per kWh.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter29: Service-entrance Calculations

Section: Chapter Questions

Problem 6R: What load may be used for an electric range rated at not over 12 kW? (Table 220.55) _____

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