Here's a peculiar device that, if the reviews are to be believed, a subset of book readers love: The AwesomePre, a portable book light designed by Seoul-based ID firm Bebop.
Rather than being a light that shines on your book from a distance, it instead resembles a screen and is placed atop the page. The device uses an LED technology developed by client MemsLux, which apparently uses "light wavelengths most comfortable to the eyes."
The obvious use case is if you're reading in bed and don't want to disturb a sleeping partner. I could also see this being useful on airplanes, where I find the reading light often produces an unpleasant, glaring hotspot that drops off around the edges.
The device features five brightness settings, and you can choose between three different light temperatures.
You'd have to turn it sideways to read larger books or magazines; the reading window measures 183mm × 107mm (7.2" × 4.2"). And I could see it being annoying when it doesn't reach the full width of a page, as seen below.
That aside, the panel is 4 mm (0.2") thick, and the device weighs 90 grams (3.2 oz).
The AwesomePre runs $69, not including shipping.