Traffic lights are being converted from incandescent bulbs to LED arrays to save operating and maintenance costs.
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Traffic lights are being converted from incandescent bulbs to LED arrays to save operating and maintenance costs. Typically, each incandescent light uses three \(116-\mathrm{W}\) bulbs, one for each color R, Y, and G. A competing LED array consists of \(106 \mathrm{LEDs}\) with each LED requiring \(12 \mathrm{~V}\) and drawing \(80 \mathrm{~mA}\) of current. There are three arrays per light, namely R, Y, and G ( Figure P1-14 ). A small city has 2560 traffic signals. Since one light is always on \(24 / 7\), how much can the city save in one year if the city buys their electricity at 11.2 cents \(/ \mathrm{kWh}\) ?
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Related Book For
The Analysis And Design Of Linear Circuits
ISBN: 9781119913023
10th Edition
Authors: Roland E. Thomas, Albert J. Rosa, Gregory J. Toussaint
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