I've been rocking the Kindle since the earliest model was available, and not only do I prefer it to any other method of reading, I found myself reading more than I would have with traditional paper books. Not that there's anything wrong with reading from a traditional book, I just personally appreciate the ease of use and form factor afforded me by the Kindle.

REFERENCE : Amazon.com/code

Since the Kindles use e-ink instead of traditional screens like your phone or iPad, they can be read in just about any lighting. In fact, the pages look like actual paper pages, so any artificial light or even bright sunlight are no factor when using the Kindle. It only uses energy when you turn the page, use the backlight or leave Wi-Fi turned on, so if you go into Airplane mode you can go weeks, even months, between charging your Kindle. Generally I go long enough to completely forget where I put my charging cable.