I'll toss in a review of my new Busch and Muller Seculite Plus rear taillight:





Pros: No more rear battery lights to get stolen (happened once so far this year) or run out of juice. Standlight is reassuring when you're at a stop.
Cons: You need the whole system of dynohub and front lamp. I'm running an SP dynohub, which I built into a wheel last fall, so bonus product review:



Pros: Very small and lightweight compared to most other models.
Cons: Will it make it through a New England winter? So far, so good.