A large North American city can have 100,000 street lamps. If these are typically $200 \mathrm {~W}$ lamps and electricity costs $\$ 0.08$ per $\mathrm { kWh }$, what is the annual electric bill if the lamps are on an average of $12 \mathrm {~h}$ per day?
(b) What would be the capital cost to replace 100,000 lamps with $75 \mathrm {~W}$ LED lamps at a cost of $\$ 600$ per lamp?
(c) What would be the simple payback period (i.e., do not include capital recovery factor, interest, etc.) for this conversion?
(d) Estimate the total $\mathrm { CO } _ { 2 }$ emission reduction over the payback period if the electricity is generated exclusively by coal-fired stations.

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The Answer of A large North American city can have 100,000 street lamps. If these are typically $200 \mathrm {~W}$ lamps and electricity costs $\$ 0.08$ per $\mathrm { kWh }$, what is the annual electric bill if the lamps are on an average of $12 \mathrm {~h}$ per day?
(b) What would be the capital cost to replace 100,000 lamps with $75 \mathrm {~W}$ LED lamps at a cost of $\$ 600$ per lamp?
(c) What would be the simple payback period (i.e., do not include capital recovery factor, interest, etc.) for this conversion?
(d) Estimate the total $\mathrm { CO } _ { 2 }$ emission reduction over the payback period if the electricity is generated exclusively by coal-fired stations.

A Large North American City Can Have 100,000 Street Lamps 200 W200 \mathrm {~W}200 W

A Large North American City Can Have 100,000 Street Lamps $200 \mathrm {~W}$