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# Formula to calculate amps per hour?

## Formula to calculate amps per hour?

#1
08-09-04, 09:45 AM
Member
Join Date: May 2004
Posts: 87
Formula to calculate amps per hour?

Is it possible to use a formula to calculate the approximate number of amps per hour this pair of lights will use?

http://www.montanajacks.com/index.as...ROD&ProdID=288

Thanks,
William

#2
08-09-04, 09:55 AM
Member
Join Date: Sep 2003
Location: Central New York State
Posts: 13,245
Of course. What size battery does an ATV have? 12 volts?

#3
08-09-04, 10:03 AM
Member
Join Date: May 2004
Posts: 87
Yes...12 volts. I would use this battery to power the lights...

http://www.motorcyclebatteriesusa.co...asp?battery=20

Thanks,
William

#4
08-09-04, 10:11 AM
Member
Join Date: Sep 2003
Location: Central New York State
Posts: 13,245
Two 35 watt bulbs is 70 watts.

Power = volts times amps.

This yields 5.8 amps at 12 volts, 5.14 amps at 13.6 volts.

Based on your other posts (you really should have combined them all into one post), with your 10 amp hour battery you will get somewhere between one and two hours of light.

#5
08-09-04, 11:53 AM
Member
Join Date: May 2004
Posts: 87
Thanks for the prompt response.

William