Low voltage halogen question regarding power

danrogers

Member

• Nov 23, 2011

• #1

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

Well-Known Member

Most Helpful Member

• Nov 23, 2011

• #2

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

 

audioguru

Well-Known Member

Most Helpful Member

• Nov 23, 2011

• #3

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

 

danrogers

Member

• Nov 23, 2011

• #4

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

Super Moderator

Most Helpful Member

• Nov 23, 2011

• #5

audioguru said:

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

Click to expand...

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

 

K

KeepItSimpleStupid

Well-Known Member

Most Helpful Member

• Nov 23, 2011

• #6

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