Sewell LightFrame V2.0 with Dimmer, 78 LED USB Powered Bias Lighting, 51 inches for up to 65" HDTV Reduces Eye Strain and Improves Perceived Contrast Ratio on Your TV Dimmer Control Allows You To Adjust the Brightness and Power Draw and to turn the Light Frame On and Off Compatable with all TV USB Ports by Adjusting the Brightness to Your TVs needs Cool White light, Improved 3M foam adhesive sticks solidly to the back of your TV or Wherever Else You Need The Light Frame Strip is 51.2 inches long with 78 LED lights. Cord is 19.6 inches long, Strip may be cut at 2 inch intervals to desired length