There are 3 color temperatures (3000K warm, 6500K white, & 4200 mixed), 3 brightness levels for each color- Low/Medium/High. The light pattern is very uniform. 

19 beads of LED mean a wider illumination area. Illuminate up to four A4 pages. 

Features a built-in rechargeable li-ion battery, enjoy your wireless up to 60 HOURS reading without charging (at low brightness setting). No need to have a power outlet during performances. Easily charged from the USB ports, AC charger. Standard Micro-USB cable incl. You can keep it plugged all the time if necessary. 4 segment blue charging indicators. Remaining battery life button. Save your money and more eco-friendly.

Portable Light weight, easy for travel, and to manoeuvre any place you want. The padded sturdy and big mouth clip provides stable attachment to music stand, headboards, piano, desks, and crafting tables.