Originally Posted by withoutfear
american dj par 38's ...each light has two wires. How would these terminate on a two prong plug from the hardware store. Is there positive and negative with these lights or does it not matter.
Back to the original post: Looking at www.americandj.com
I see two different PAR38 units, one black and the other silver, with very different designs. The silver one is identified as ETL listed, the black one is not identified. I am going to guess that you have the black ones because the silver one is said to have a three prong power cord.
You can use a continuity checker to find which wire goes to the center contact of the lamp socket and which goes to the outer screw ring. Idealy, the "hot" wire should go to the center contact. Since there is no switch in the unit itself, there is not much practical difference as to which is which. Some lighting fixtures do not have different colored wires going to the lamp socket...just a green one to denote the grounding wire.