They are NOT the glass bullet lights as you've descirbed. I've seen those before. While these are bullet shaped, they're machined aluminum. At the "tip" of the bullet, there's a cut out for an allen wrench to tighten them. There's a slot cut in the side of the bullet that allows light to come out ans shine on the license plate. I know that with 2 wires, one's gonna go to ground and the other to the power. What I need to know is should they be wired in paralell or in series.

Thanks,

Rick