The Day-light Sky Is Designed To Provide Optimal Bright Light Therapy Treatment And For The User The Two-light Setting Provides 10 000 Lux While The One-light Setting Provides Convenient Task Lighting Brightzone Technology Engineered And Tested To Provide The Field Of Illumination And 10 000 Lux Experts Recommend For Maximum Therapeutic Benefit The Day-light Sky Light Enclosure Is 33% Smaller Than The Day-light Classic While Mainlining The Same Field Of Illumination Adding Versatility For The User The White Diffusing Lens Eliminates Glare And Evenly Distributes The Light Two 55-watt Light Tubes Emit A Warm Light And Minimize Potentially Harmful Blue Rays Hi-impact Polycarbonate Lens Filters 99.3% Of Harmful Uv Rays The Height Adjustable Arm Allows The Light To Be Positioned At The Appropriate Height And Angle For The User; This Is The Optimal Light Positioning Recommended By Light Therapy Experts Manufactured With High Efficiency Electronic Ballasts The Day-light Sky Eliminates The Annoying Flicker Experienced With Ordinary Fluorescent Fixtures