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ByDave Rongey © Ask the Electrician 2017 Author, Licensed Electrical Contractor
» Home Electrical Wiring Guide Book

Energy Savings Calculation for Lighting

How to Calculate Energy Savings for Lighting: Is there any difference in the energy savings if I replace light bulbs in a regular 120 volt fixture or in a 12 Vac low voltage fixture?

Calculating Energy Savings
Electrical Question: Is there any difference in the energy savings calculation if I replace light bulbs in a regular line voltage (120Vac) fixture or in a low-voltage (12Vac) fixture?

Thank you for your response.

Additional Comments: Great site.
Background: Doug, a Homeowner from West Palm Beach, Florida.

Dave’s Reply:
Thanks for your electrical question Doug.

Energy Savings Calculation

Note: It is important to note that watts are watts, no matter what the voltage will be.

How to Calculate Energy Savings for Lighting

Example:
Watts x Hours x Cost Per KWH /1000 = Cost/Savings

Note: Keep inĀ  mind that the KWH Rate is Cost Per 1000 Watt Hours so you will have to divide the results by 1000.

The Advantages of New Technologies in Lighting
The energy saving advantages of new technology lighting is that the amount of light that is produced is comparable to most older lights, except the new lights consume less watts while producing a high lumen amount of light.

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