Lights

I'm currently commuting with over 3,200 lumens and it's wonderful.

Not a car turns out in front of me.
Not a single pedestrian steps out.
Vehicles in a queue of traffic turn slightly out of my path.

It's bliss.

I have just had to send my Six Pack back to Exposure for repair and and reduced to a pathetic little light that a few years ago I would have been very impressed by. Boy do I miss those lumens!
The only thing that worries me is it is a sort of arms race, and people who don't spend mega bucks on lights these days are effectively losing the battle, even if their lights are perfectly legal.