This Led Lamp Has Many Advantages high light output; with lower energy demand, Click the button: adjust the intensity light, 3 levels adjustable. Press the Button for 2 Secondsadjust the color temperature in 3 levels (3000K warm light for sleeping, light 4200K warm white light for relaxation, 6500K cold white light for reading). High brightness High EfficiencyDivisible lighting head can provide larger lighting area, latest SMD LED reading light provides the best color temperatures and brightness, ;will significantly save your eyes when reading in the dark. or reading in bed, especially for children. Click the switch to select the brightness mode. that you like the most in 9 different conditions. Comfortable ReadingThe built-in battery gives you 65 hours of wireless reading time. The clip on book light has 14 LEDs and more brightness modes. Whether you like warm or white light, bright or soft, our reading lamp will perfectly meet your needs. your satisfaction. Long-lasting bulbs, no heat production, eye care, etc.