I bought the beacon 2 tail light assembly from
www.motoelekt.com  That's Rick Jones at Motorrad Elektric.  He's great to do business with, and the tail light assembly is very bright (many LED's), and has a bright set of white LED's that illuminate the license plate and the ground under the rear fender.
After riding my neighbors Honda around the block with him on my BMW, I was very impressed at how bright and visible the
tail lights were even while riding into the sun. His lights were hardly visible. The beacon is hands down the best way to increase visibility from behind.
I'm not exactly sure of the details, but you could go to LED turn signal bulbs if you wired some ballast resistors in or maybe used a different flasher unit.
There are devices that make your brake lights blink before staying on too. Â Have no experience with them but I see them often on sport bikes.