I would like the opinions of others regarding the interpretation of the Baseline Building Performance Lighting of Table G3.1 in Appendix G.

Table G3.1, Item 6. Baseline Lighting, last sentence states the following;

"No automatic lighting controls (e.g. programmable controls or automatic controls for daylighting utilization) shall be modeled in the baseline building design, as the lighting schedules used are understood to reflect the mandatory control requirement in this standard."

I am questioning 2 ways to interpret this in the model. I will use a 10,000 sf office building with typical business hours of operation from 8 am to 6 pm. Most spaces are required to have automatic lighting controls as specified in the Mandatory Provisions of Section 9.4 (ASHREA 90.1).

1. The Baseline lighting schedule would typically ramp up starting at maybe 6 am, dip for lunch, and ramp down until maybe 8 pm? The maximum power density would be that allowed using the space-by-space method and Table 9.6.1 in ASHRAE 90.1.

2. The Baseline lighting schedule would ramp up starting at maybe 6 am, dip for lunch, and ramp down until maybe 8 pm (typical scheduling)? The maximum power density would be that allowed using the space-by-space method and Table 9.6.1 in ASHRAE 90.1. with the 10% Power Adjustment factor of Table G3.2 applied to the lighting demand of spaces required to have mandatory controls of Section 9.4.

I have typically used option 1 without question from the USGBC which increases savings, but was wondering how others have interpreted it.

Are occupancy sensors "programmable controls" - delay time?

Thanks

Brett Fero, P.E., LEED AP