I have ree lights on my front and rear tires (magnetic lights that blink with the rotating tires and don't need batteries) and on my head I have a really bright Petzl light. Most of the roads I ride have streetlights, so I don't really need bright for seeing, just for being seen.

Now on the back I'm lit up like a Christmas tree. A seatpost knog blinking, a super bright blinking light on the rear rack, a light on the back of my helmet, and a safety triangle that has a built in LED strip that blinks (along with reflective tape on the frame and fenders) and the ree light on the rear tire. You can't miss me from the back.

For side illumination I have a green "glow stick" thing that blinks that sits under my downtube. It illuminates from the side and down onto the street.