Hi Madhav,

You are correct. Exterior lighting power is part of the mandatory provisions (section 9.4) for chapter 9. The only thing I would check is to see if the additional unrestricted allowance (90.1-2007) or base site allowance (90.1-2010+) can make it so your fa?ade lighting meets the maximum allowable requirement. Some people don't seem to realize that this additional allowance can be applied to either tradable or non-tradable surfaces. You might also double check that any of the exceptions to the exterior lighting power aren't applicable like lighting used to highlight features of public monuments and registered historic landmark structures or buildings.

Hope that helps.

Thanks,
Alex

Alex Chapin EIT, BEMP, LEED AP BD+C, O+M
Energy Engineer | Mason & Hanger
A Day & Zimmermann Company
O 804.521.7072
4880 Sadler Road, Suite 300 | Glen Allen, VA 23060
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