here's a mod i made today using 12" flex LED's from custom dynamics. i left the stock turn signals on so you can compare the brightness, but they are comin off now.
applying the 3M double sided tape
not only does it clean up the rear, but it is more visible from the sides than the stock signals. the lights are totally unnoticable until lit. it's 2-up unfriendly, however. but, i will only ever ride 1 up on this bike.