I don't do photos yet. Progress. I've bought this (yes I know and whatever and talk to the hand girl-friend etc);
http://www.24mx.co.uk/motorcycle/p/twenty-led-taillight/386/lights-and-indicators/k261/SERIAL NO: E4 12v 2.4w/o.5w 50R-00 1383 YM-2875E LED (knowledge is power).
I wanted the board out of it to fettle into a 550 rear light housing. 35 red leds rearward facing and 4 white leds for the plate.
Did a quick rig and it worked ok.
Caveat: I don't know much about this company and their delivery outfit for my purchase was 'hdnl' who seem to have a fair few disgruntled customers but I was very, very drunk. Anyway, item arrived, properly packaged, within delivery estimate and as described.
Honourable plug: More progress, I've purchased an transistorized electronic ignition system from Mark Paris ... Hondaman ... as per universal recommendation. It's all true. Mark, you're a gentleman and a scholar.
The Sun is leaving, it's time to go under.