This is on roads? As I think there is an offroad night version too??
A buddy of mine did this last year - beware potholes on dark descents - so the better your lights, the more likely you are to pick them out at speed on a downhill!
He hit one so hard, his lights fell out and his bars moved in the stem (sounds like they should've been tighter but you get the gist).
I'll ping him an email see if he has any other thoughts.
There was some big off's this year and that was in the day.There's too many inexperienced rider's out there mixing it with what we call rider's and they crash and burn every year
Some lass used her face as a brake on one of the descent's,can't remember which and it wasn't pretty
On another note though,this year i found a very noticeable difference in the bike's used.For year's it's been mountain bike's mainly being ridden but the switch to road bike's shocked me a bit this year as i didn't see many retro mounatin bike's at all.Every year you could count on seeing the odd stumpy and xizang
Current rides - 1990 Muddyfox Courier Prestige - 1992 Salsa Ala Carte - 1992 Chas Roberts D.O.G.S B.O.L.X. - 1993 Merlin Mountain Single Speed - 1994 GT Xizang
In progress - 1992 GT Bravado
Old rides 1989-1997.viewtopic.php?f=1&t=228103