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 AC, DC Voltage and Bulbs?		  New Topic  Reply to Topic
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Arnak
Apprentece

9 Posts
Posted - May 14 2009 :  12:55:14 PM  Show Profile  Reply with Quote
Hi Folks,

I just wondered could you use a 12v bulb normally on a dc power supply on a 12v ac supply?

The reason why I ask is that I have some dolls house lights and they run on a 12v ac transformer but I need a higher wattage bulb as a backlight to a stained glass window.

Of course, normal 12v bulbs are dc not ac so would it work and why not if it wouldn't?

Thanks for any advice.

Arnak

audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - May 14 2009 :  2:59:42 PM  Show Profile  Reply with Quote
12VAC provides exactly the same amount of average power to a resistance like an incandescent light bulb as 12VDC.
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Arnak
Apprentece

9 Posts
Posted - May 14 2009 :  6:01:29 PM  Show Profile  Reply with Quote
Hi Audioguru,

So does that mean that it would be ok to use the ac instead of dc?

Sorry for my ignorance.

Thanks,

Arnak
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audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - May 14 2009 :  7:35:36 PM  Show Profile  Reply with Quote
Yes you can use AC instead of DC and the light will look the same.
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Arnak
Apprentece

9 Posts
Posted - May 15 2009 :  04:57:53 AM  Show Profile  Reply with Quote
Hi Audioguru,

Great, thanks for the help!

Arnak
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