The cup has UV lights in it. The color option that you must select is for the color of the SWITCH that we send with the cup.
If you are building your own boxes and would like to add a jig charging cup to them, then this is the cup for you! Our "Glow-ry Hole" jig cup is a 2 peice cup with a detatchable top so you can rotate the bottom half with the wires for your set up. This cup has UV LEDs to light up your glow jigs at night or in murky water.