The mean urban streets require powerful lights and video cameras in my opinion. There are too many intoxicated, distracted, and dangerous motorists on the road. Powerful taillights have the effect of slowing down drivers behind you. A bright helmet light in addition to a bar light can fill up the inside of the vehicle cabin. A video camera will capture license plates, the driver behind the wheel, in addition to the model. This evidence can be very useful in the event a cyclist is smashed by a 3,000 pound rolling couch. If you refuse to put the odds in your favor, this is entirely your choice.