How much light does the Bright Light produce?
The Bright Light yields between 2,500 and 10,000 lux, depending on how far away you sit from it. Lux is the unit of illumination. People need light of a certain intensity each day to feel fit and healthy. In winter, the amount of light outside on a cloudy day may be as low as 1,000 lux, whereas on a sunny summer day it sometimes exceeds 100,000 lx. Even in a well-lit room, the amount of light usually does not exceed 500 lux.