The First and Only lamp with Intensity Controls and Full Color Tunability.3, 000K-6, 000K Color Adjustment and Fully Dimmable.Two Lenses Included - High Output Conical Lens for light therapy and Opaque Lens for everyday use.The Highest Optical Performance - Maintains a 95 CRI at all settings.Light output comparable to 200 watt halogen lamp.Patented dimmable Flex Arm lamp for ideal comfort.Can be used for both light therapy and as a high quality task lamp producing 10, 000 lux at 12" and 5, 000 lux at 16".Energy efficient LED Technology using only 30 wattsLED light engine lasts up to 50, 000 hoursPerfect size for desk use. 18" tall, lamp head is 5 38" long x 4.25" wide, base is 8.5 x 7 x 1.5".