Even Bell just uses a red one in place of the slear one and just changes the battery tray and power buttons to red on their Radian 3-LED set that is well under 20 bucks.


however...


If you just go to the auto parts store and get the big square/rectangular utility taillight for autos/trailers and adapt it... you have a big honking taillight.


Added benefits - they sometimes have side panels, so you have added visibility from the side.