Hi
I have a 12V 50W down light and i am powering it with a 12V 1.2Ah Drill battery but the battery runs out of power too quickly and the light starts to dim, is there any way i could run this from the power point? I have the drill battery charger plug pack, 14VDC 850mA but the light dose not fully light.

Thanks, Chris

 

Use a 12V @ 5A power supply. Your " down " light draws over 4A.

 

Ok Thank you i will try that if i can find a plugpack with 5A output

 

It is not likely that you will find a "wall wart" power supply capable of 12v@4A, which is what you need.

Marlin P. Jones & Associates has these 12v 50W supplies on sale for under $3:
http://www.mpja.com/email/11-24-09a.asp?r=%%ref%%&s=38

You would also need a power cord, fuse holder and fuse (1A slow blow), ventilated enclosure, and wiring to connect your light. It shouldn't be terribly hard to connect up, but if you are just starting in electricity/electronics, see if you can get someone with some experience to help you locally.