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Which bulb would use most power?

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flobadob | 23:37 Mon 05th Mar 2012 | Home & Garden
3 Answers
Which of the following would use most electricity?
1. A 240v halogen bulb
2. A 12v halogen bulb connected to a 240v-12v transformer
Thanks.
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Avatar Image Buenchico
Are we to assume that they're the same power rating? (If not, the question is meaningless!).

If so, the BULBS will both use the same amount of power but (slightly) more power will be used IN TOTAL by the second option, due to heat losses within the transformer.

Chris
23:40 Mon 05th Mar 2012
Avatar Image flobadob
Question Author
Yeah, they'd be 40W, thanks for that.
23:47 Mon 05th Mar 2012
Avatar Image Old_Geezer
If that concerned about saving power I'd suggest you may be going a bit OTT.
08:02 Tue 06th Mar 2012

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