HomeMy WebLinkAboutAgenda 09B_SP-19-28_635 Community Dr_SunCap_docs_reduced1
Marla Keene
From:Donna Leban <lightspd@comcast.net>
Sent:Friday, September 13, 2019 10:42 AM
To:Marla Keene
Subject:Re: SD-19-22 SP-19-28 635 Community Dr - FedEX Lighting
Marla,
The lighting immediately around the FedEx building has been reduced to a better level.
The employee parking lot, which is included in the avg 3.0 calculation still has a much higher illuminance level than is
needed for employee parking. The minimum fc points on the site are generally at 0.2‐0.5 fc at a point midway between
the light poles and drive areas. Points around the perimeter that have no foot travel can be as low as 0.1 fc. Looking
at the employee parking area, the midway locations are over 1.0 fc on the current plan. This needs some additional
work. Otherwise, things are going in the right direction.
Also, based on current exterior lighting control technology, significant energy savings can be achieved by incorporating
sensor technology that would cut light levels by up to 80% when there is no movement in the parking lot. The project
owner would be able to get rebates from Efficiency VT to pay for this energy efficient upgrade. And, everyone would
benefit by not having a prominent site adjacent to I89 lighted to a very high level all night long. Night lighting will lead
to significant sky glow, particularly in the winter when there is snow on the ground. The adjacent towns of Williston and
Essex Junction both require night set back of exterior lighting for commercial facilities.
The gentleman who presented himself as the lighting designer at the DRB meeting (Clark?) is not the person who did the
lighting selection and plans. He is an electrical engineer or designer, and not certified by the National Council of
Qualified Lighting Professionals (NCQLP). He may be very knowledgeable about electrical design, but does not appear to
be familiar with lighting ordinances or energy code requirements, and is not the proper person to address lighting design
criteria or issues.
Regarding energy code compliance, the 2015 VT Commercial Building Energy Standard (VTCBES) sets a limit on parking
lot and drive lighting for facilities with significant night activity of 0.10 w/square ft. This calculation needs to be spelled
out on the drawing to verify compliance. There are also limits on lighting of doorways including 20w/linear ft of door
width, which would apply to the industrial door openings around the building.
Act 250 will also require compliance with the VT CBES.
Donna Leban
‐‐
Light/Space/Design 7 Iris Lane South Burlington, VT 05403 802‐862‐1901 www.lightspacedesign.biz
On 9/13/2019 8:33 AM, Marla Keene wrote:
Hi Donna,