I use several lights and wear a yellow reflective jacket. On the bar I use a 1 LED Cat Eye that uses 2 AA cells on flash mode and then a Light and Motion Stella 150 beside it on solid. If I am riding someplace especially dark I might also use my old Halogen helmet light. On the rear I have a PB superflash, a Portland Design flashing red and another helmet mounted one. Most of my commuting is on streets with some ambient lights so I don't necessarily always go whole hog with the forward facing lights.