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Wayne Roberts
Wayne Roberts, Electrical Technician
Category: Electrical
Satisfied Customers: 81
Experience:  Electrican 6+ years
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I need to light a 12V incandescent bulb. what`s the smallest

Customer Question

I need to light a 12V incandescent bulb. what`s the smallest battery I
can use? I tried an A23 12V battery but it doesn`t work.
Submitted: 9 months ago.
Category: Electrical
Expert:  Wayne Roberts replied 9 months ago.

Hello sir, my name is ***** ***** I would love to help, to answer your question we would need the wattage of the bulb.

Customer: replied 9 months ago.
25w
Expert:  Wayne Roberts replied 9 months ago.

you must achieve at least 2 amps for the bulb to work. There are 12v battery options with the required amperage available for a single battery to be used, or you can use multiple smaller batteries to do the same work..like in a flashlight..

Customer: replied 9 months ago.
I know there are 12V battery options I can use. I need to know the smallest battery that will light the bulb.
Expert:  Wayne Roberts replied 9 months ago.

however the bulb should light, even if very dim, with considerably less than 2 amps

Expert:  Wayne Roberts replied 9 months ago.

are you expecting the bulb to light to full brightness? or just to begin to glow?

Customer: replied 9 months ago.
It doesn't have to be full brightness, maybe half.
Expert:  Wayne Roberts replied 9 months ago.

another consideration is how long you would light it to work?

Expert:  Wayne Roberts replied 9 months ago.

like it to work*

Customer: replied 9 months ago.
Just a few minutes would be fine.
Expert:  Wayne Roberts replied 9 months ago.

Something like this would light the bulb for about 15 minutes at full brightness and 30 ish minutes at half brightness.

Expert:  Wayne Roberts replied 9 months ago.

and its rechargeable :)

Expert:  Wayne Roberts replied 9 months ago.

finally, incandescent bulbs efficiency goes down at lower temperatures. So, even though you are using less total power you probably wont see the 30 minutes at half.

Expert:  Wayne Roberts replied 9 months ago.

half brightness*

Expert:  Wayne Roberts replied 9 months ago.

you can go smaller, but the times will decrease accordingly.

Expert:  Wayne Roberts replied 9 months ago.

I hope I have been helpful in this matter, if you have any further questions i am still here. If you have a moment, please rate me so the higher ups know i am doing a good job ;)

Expert:  Wayne Roberts replied 9 months ago.

If there are any other questions you may have i am still here to help,we can go in depth to an exact amount of time you would like your bulb to work, if you take a second to rate my service i would really appreciate it.

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