How Long Should You Use A Light Therapy Lamp?
How Long Should You Use A Light Therapy Lamp? For SAD, the typical recommendation is to use a 10,000-lux light box at a distance of about 16 to 24 inches (41 to 61 centimeters) from your face. Duration. With a 10,000-lux light box, light therapy typically involves daily sessions of about 20 to 30 minutes.