3 COLOR TEMPERATURES AND 5 BRIGHTNESS: 3 types of color temperatures, warm light (3000 K), warm white light (4500 K) and white light (6500 K). Each CT has 5 brightness levels, so 15 light modes are generated. meet all your requirements. Clip the bed or headboard and read in the bed, comfortable light brings you a comfortable life! ANTI-FLICKER LIGHT & EYE PROTECTION: The high-quality Semlos reading light with 5W LED, which saves up to 80% of the energy used by conventional lamps, gives you the same brightness. No flickering, no dark areas, no ghosting, and a low HEV value eliminates eye strain caused by the strobe effect of traditional light sources. Protect your eyes when reading, drawing, working, and studying.