Day-Light Bright Light Therapy System Day-Lights are specially designed bright light therapy lamps recommended by doctors as the first line treatment for Seasonal Affective Disorder (SAD), or the "winter blues". Used in clinical research for over 10 years, Day-Lights conform to all standards set by light therapy experts - they provide the recommended 10,000 lux light dosage; the light source is delivered at an angle that mimics outdoor light; and they are 100% UV-filtered for safety. 20-30 minutes each morning is all it takes to significantly improve energy levels and regulate sleep patterns for those who respond to light therapy. The compact Day-Light casing can be used alone with the built -in tilt-back stand, which also fits conveniently into standard carry-on luggage. Three compact fluorescent light tubes (4000 Kelvin) deliver 10,000 lux at 12 inches of light therapy usage. Two-way switch allows alternative 2-bulb, 7,000 lux setting.