I have a maybe 500 lumens floody P-7 on the bars and a throwy 250 lumens Q5 on the helmet. Cheap Chinese flahslights so that I don't mind if they don't last, get dropped or water ruins them. Li-Ion 18650 rechargeable batteries. Spare battery in the seat bag. Two PBSF for the rear. I have a small frame bike and flashlights take up less space. I don't want a large clunky battery bag with *wires*. I'm adding a Knog Beetle/Frog on the front fork to have some flasher in front to help improve distinguishing me from four wheel vehicles. I'm not sure how I'll like the flashing. If I'm riding at night, I care more about not crashing or getting hit than I am about the additional weight. My $100 investment has served me well.