OttLite B01G59-FFP Portable LED Book Light, Black Sturdy no-slip clip holds tight to magazines, books and more Strong yet flexible 7.75 inch neck holds position 2 power options - use with 3 AAA batteries or power from your computer with included USB cable Stable base allows light to stand on its own Six super bright Natural daylight LEDs, rated to last up to 40,000 hours - light output is 50 lumens