 The new standards are similar to the old standards, but also intend to “reinforce circadian rhythms, and reduce the use of electrical lighting by introducing daylight in the space.Two options exist for achieving the maximum value of these two most recent points.One option is to use a computer simulation to demonstrate that a spatial daylight autonomy of 300 lux for at least 50% of the time, and an annual sunlight exposure of 1,000 lux for 250 occupied hours per year, exists in the space.