Patent ID: 8643311

Claim:
A method of controlling spectral output of a lamp-comprising light sources selected from the group consisting of a fluorescent light source and an LED light source, the light sources including at least one light-generating mechanism which differs from at least one other light-generating mechanism, the method comprising: specifying a first spectral output frequency greater than zero for a first geographic location and specifying a second spectral output frequency greater than zero for a second geographic location; determining a geographic location of the lamp; comparing the geographic location of the lamp to at least the first geographic location or the second geographic location; determining a desired spectral output frequency based on the comparison of the geographic location of the lamp to at least the first geographic location or the second geographic location; and controlling the spectral output of the lamp based on a user preference, the user preference assigning a priority of control between the determined desired spectral output frequency, a switch position of the lamp, and a determined calendar setting.