Impact Archery makes a sight called the cosmic ring. BRIGHTEST sight ive ever seen or used. You probably dont even need a light, but, they do make an adapter for a blue light which lights the pin up like a christmas tree. Its also a vertical pin, but can be changed to be a pin from the right, from the left, or hanging from the top. They have 2 fixed sights, a movable sight, and then just a regular threaded rod sight to screw in to somethin else. I dont know about the cobra.

www.impactarchery.com