My rear light bar i made on my KMX Trike. I found a piece of aluminium tube and cut it to length and then helically wound some Kalfords reflective tape around and along the length. I then used some self amalgamating tape (i swear by this and being a licenced radio ham i use this a lot) which i capped the open ends with and to stop any aluminium cutting me etc. I then cable tied the bar to the rack and wound plenty of S.A. Tape around to secure it even more. Next i connected the 2 tail lights after super guing the releases so they cant be taken off and then i wound more S.A. Tape around the circular fittings to stop them moving etc.