Circadian Optics Langham Clinical Grade Light Therapy Desk Lamp. 10,000 LUX at 18", panel is 22" x 12". Wonderful for sleep issues and seasonal affective disorder. I received this as a gift but I already have a smaller lamp from the same company and our home is much too small for this larger lamp. It is brand new in the box, I have only used it once and it is in perfect condition. Retails for $199.