Question: You need to provide sufficient light for a work area, and you determine that 1600 lumens would be adequate. You discover that there are four

You need to provide sufficient light for a work area, and you determine that 1600 lumens would be adequate. You discover that there are four competing light sources that can deliver that amount of light: a $100 \mathrm{~W}$ incandescent bulb, a $100 \mathrm{~W}$ halogen bulb, a $32 \mathrm{~W}$ compact fluorescent lamp (CFL), and a 16.5 W light-emitting diode (LED) lamp. Each has advantages and disadvantages. You build the following table to help you make a decision. Considering the overall cost over the stated lifetime of each light source, which would you recommend if electricity costs 12 cents/kWh?

Bulb type C ost per 1 amp Power u sed A verage

Bulb type C ost per 1 amp Power u sed A verage 1 ifetime Incandescent $2.50 100 W 2500 hr 100 W 3,000 hr 32 W 10,000 hr 16.5 W 25,000 hr Halogen CFL LED $5.25 $14.00 $9.00

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Consider the LED lamp first Purchase one LED lamp for 900 and operate it for its lifetime of 25000 hours The energy used will be 25000 hr165 W 4125 kW... View full answer

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