A light monitoring device for treating sleeplessness includes a housing and a light sensing and evaluation system. The light sensing and evaluation system includes a light sensor unit, light measure circuitry measuring light of specific frequencies and intensities, and programmable light evaluation circuitry analyzing the light spectrum exposure for the user based upon measurements made by the light measurement device. The programmable light evaluation circuitry determines when predetermined thresholds relating to exposure of the user to specific light frequencies and intensities are reached. The light monitoring device also includes a warning system providing the user with a warning when the predetermined thresholds are reached and a data storage device storing data generated by the light sensing and evaluation system.
