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Your proposed model has 1000 W of light power, but because you have an occupancy sensor you would install 900 W (10% less) if your area is greater than 5000 ft²/460m². You would then apply a lighting schedule, same in the proposed and baseline.

Your proposed model has 1000 W of light power, but because you have an occupancy sensor you would install 900 W (10% less) if your area is greater than 5000 ft²/460m². You would then apply a lighting schedule, same in the proposed and baseline.


Let's say the zone is 6000 ft², an open office, and you're using the space by space area method.

  • Baseline: 6000 * 1.1 W/ft² = 6600 W
  • Proposed: 1000 W * (1-10%) = 900W
  • Both have the same schedule.