I ride with a Dinotte 600 lumen LED light in the winter. I bought the light for night mountain biking, and it's is an excellent light for that purpose. It's also an excellent light for commuting and I don't think it's too much. One just needs to be careful not to aim the light at motorists unless you are trying to get that particular motorists attention.

I also ride with a Dinotte 140L taillight year-round, and in the summer a Dinotte 140 amber Daytime Running light. The daytime running light is particularly effective, as I have watched many motorists begin to pull out of side streets or turn left in front of me, catch sight of the amber light flashing and STOP. I have also had several motorists pull up next to me at intersections and comment how easy I was to spot on the road.