Calculate Battery Discharge Time for Car Lights | 60 Ah Capacity

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To calculate the battery discharge time for car lights, first determine the total power consumption by adding the wattage of the headlights and parking lights. The headlights consume 60 W each, and with two headlights, that totals 120 W. The four parking lights at 5 W each add another 20 W, resulting in a combined power draw of 140 W. Next, convert this power consumption into current using the formula P=IV, considering the typical voltage of a car battery, which is usually 12 V. Finally, use the battery capacity of 60 Ah to find the discharge time based on the calculated current.
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The headlights on a car operate typically at 60 W and the parking lights
typically at 5 W. Assuming there are two main headlights and four parking lights,
what length of time will it take to discharge a 60 Ah battery, if the
lights are left on?


I'm trying to practice my problem solving skills, but I'm just a bit suck here. Could someone please offer me a hint? No solutions of course.


Would I add the the power of all the lights together?
 
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Yes power adds.
You also need to know the current taken by the lights, (P=IV)
And the typical voltage of a car battery.
 

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