How Can You Read in a Dark Place (Such as in a Gym, Bus or Plane)?

Problem scenario
You are going to be on a bus or plane that may not have good lighting, and you want to read. Or you want to read in a gym that does not have enough light. What should you do?

Possible solution
Buy a Glocusent 16 LED Mini Book Light. It can provide 80 hours of illumination.