SUNCATCHER LED Therapy Lights help people of all ages fight fatigue and increase alertness during the long winter months. SUNCATCHER uses LED technology that helps people regain focus when there is a lack of sunshine and natural light commonly known as the winter blues. The Ultra model light therapy lamp delivers up to 10,000 LUX* of light to maintain energy and productivity lost due to disruptions in your circadian rhythm that occurs from inadequate access to natural daylight. The Plus model offers three light intensities includes a timer control 10,000 LUX, 7,500 LUX and 5,000 LUX with sessions of 90, 60, 30 and 15 minutes - to maximize your comfort to help regulate your light intake. Customize your sessions with the included timer by using different intensities and different times of light exposure throughout the day in your home, office or hotel. Great for travel and home use, the Plus model can be positioned on a surface or mounted on a wall for customizable light sessions. The 100 LEDs last up to 50,000 hours for silent and flicker-free light and are UV-Free