Interesting. I was very tempted by Solidlights for the tandem when URC started squeeing about them - if I hadn't just splashed for a Lumotec Plus and E6 secondary for it and didn't know rationally I'm perfectly happy with those in the dark at 40mph, I'd have gone for it.

Mind you, although I have an LED rear, I did think it was worth running a mile of speaker cable to the back of the tandem (and likewise on my solos).

Legs Larrington does say the PBP is less tough terrain than any UK 600, overall.