This is a copper jumper strap normally used with the ground wires in the spa. These are mounted on the back of the pumps connecting the ground wire. Is part of the connections from the heater to the PC Board.
This replacement spa light bulb is one element to the lighting system and is specific to the 2012 Contractor Series models CS 360 and CS 415. Spa light bulbs help to bring a unique ambience to your home spa.