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How Much Power Do GU10 Bulbs Use?

Updated February 21, 2017

GU10 base bulbs are 120 volt halogen bulbs that can be used in line voltage track lighting. The bulb provides an MR-16 size bulb without the need for a transformer. Often found in retail facilities, the GU10 baseline voltage halogen light bulb provides a bright, white light.

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  1. Remove the 120 volt GU10 bulb from the socket. Place light pressure on the bulb and turn it counterclockwise to remove it from the fixture.

  2. Look on the GU10 bulb for the bulb wattage. GU10 bulbs are available in 20, 35, 50 and 75 watts. If the bulb is not marked, check the fixture or the fixture socket for wattage requirements.

  3. Divide the GU10 bulb watts by 120 volts to determine how many amps the bulb draws. For example, dividing the 35 watts of the GU10 bulb by 120 volts equals a .29 amperage draw or .01458 per cent of a 20-amp breaker.

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About the Author

Cecilia Harsch has been writing professionally since 2009. She writes mainly home improvement, health and travel articles for various online publications. She has several years of experience in the home-improvement industry, focusing on gardening, and a background in group exercise instruction. Harsch received her Certified Nurses Assistant license in 2004. She attended Tarrant County College and studied English composition.

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