I bought the pink one because it was cheaper by far, and I *think* it is less likely someone will steal the pink one.  The light is excellent for my Kindle or any other book. I recently sat an overnight vigil for a friend in hospital, and was able to read very comfortably all night.  Unsure how long the batteries will last, but being able to read in that dark room all night was priceless. No heat involved. Lightweight. I was reading with the one-lamp setting and it was fine; 2-lamp setting is almost two bright for me. Nicely focused light, too, fine for bed-reading.  It'll be great on a plane.