Low voltage halogen question regarding power

[danrogers]

Hi all, I'm just planning my kitchen lighting. If I use a 50w 12v halogen bulb, powered by a 20-60w 12v transformer, how much will that draw from the 240v supply? Will it be 50w?

Thanks

 

[alec_t]

It will be a bit more than 50W because of transformer inefficiencies. Perhaps 55W ?

 

[audioguru]

I used compact fluorescent light bulbs in my kitchen and all over the house because they waste much less power making heat.

 

[danrogers]

thanks guys, that's rather a lot of power. I think I will use 20w bulbs because I have 12 holes cut out the ceiling lol. I use compact fluoro's everywhere else I starting to wonder If I should have invested in some LED GU10 down-lighters instead

 

[Nigel Goodwin]

I used compact fluorescent light bulbs in my kitchen and all over the house because they waste much less power making heat.

And are perfectly fine for some purposes, but low voltage halogen's are much better for many other purposes.

 

[KeepItSimpleStupid]

The transformer losses may be on the order of 1-2% of 50W. Nothing significant.