I used 3/4" PVC, some electrical conduit fittings, LED lights, a 12" x 12" red flag, flat black paint, reflector decals, and a TKF sticker to build the light rig. All of my kayaks have rudders so I utilized the rudder mount to affix the rear portion of the rig after removing the rudder and cables. Since my longest kayak overhangs the bed extender by 5 feet I made the PVC frame just over 5 feet in length so that the strap securing my kayak to bed extender also holds down the light rig. The width in between the PVC is wider than the tankwell so if I choose leave a milk crate or cooler while traveling I can still fit my light rig. The rear LED's are one of the smallest, red, 3-wire lights on the market which allow for brake and turn signals. I then used small, round, red and amber marker lights on the side. The PVC and conduit fittings let me cleanly wire everything within the PVC, except for the 8 foot jacket cable running to my truck's trailer lights plug. I thought it worked great on its maiden trip to Rockport this past weekend.