I use 2 lights front and 2 lights on the back, 1 steady and 1 blinky. I prefer AA, AAA powered lights and carry spare batteries. On the back 1 of them is the cateye LD1100. As I'm on well lit streets/roads the other lights aren't particulary high powered certainly not powerful enough to ride at speed on unlit roads. So far I 've been visible from behind, and from the front approaching junctions.