This invention provides an artificial
lighting system and method for promoting circadian health. [Solution] Methods, systems, and computer-readable media utilizing artificial lighting regulate the human circadian
clock. By utilizing light-emitting diodes (LEDs) that emit wavelengths associated with the human
opsin absorption spectrum, the device can stimulate human opsins. For example, the device replicates normal
sunlight (for example, based on the season or
time of day) by emitting light that changes in rhythmic intensity or spectral modulation.