My old set of lights have died and I'm contemplating what to get next and how bright they need to be. my old set were 240 lumens but I usually ran them one setting down which was around 190. This was more than adequate for a bimble around the woods but doesn't really cut it when in a group with bigger lights and riding fast. Lots of the folks I ride with are using mj808s which are 900 lumens but most use them on the next setting down so not at 900.
So the question is, what is a sensible number of lumens to go for. I know there are some huge lights out there now but what do people find is enough?