Bike lights and bike fitting
My buddy Bert was asking about bike accessories and the best bike light in dark Arc Li-Ion. The light is just incredibly bright and with a lithium ion battery, it is less than a pound. Its about $450 at Colorado Cyclist
If you are going on epics they have Arc Li-Ion Ultra with a truly gigantic battery that goes for six hours. Just right for that six hour ride around the lake. They are expensive at $550 at Supergo
I actually never go on any bike ride in dark or light without one of these.