PARKING LOTS
Parking Lot Photometric Plans.
Permit-ready calculations for drive aisles, stall fields, pedestrian routes, and property-line trespass built for the standards your jurisdiction reviews.
THE REQUIREMENT
What the code requires and why.
>= 0.5 fc
Minimum illumination (SeaTac)
<= 7.5 fc
Maximum illumination (SeaTac)
15:1
Max uniformity ratio
<= 0.1 fc
Residential property line (Bonney Lake)
Parking lot photometric plans are reviewed for more than fixture count. Plan reviewers look for documented visibility across drive aisles, pedestrian paths, stall fields, and lot edges so the installation can support circulation and safety without creating spill light onto adjacent property.
The current IES roadway and parking reference is ANSI/IES RP-8-25, and many jurisdictions publish their own maintained illumination criteria on top of that baseline. SeaTac, for example, lists District 1 and 2 parking lots at no less than 0.5 fc, no more than 7.5 fc, and a maximum-to-minimum uniformity ratio of 15:1.
A permit-ready plan also has to address light trespass. Bonney Lake limits rear and side property lines next to residential or rural uses to 0.1 fc, which is why the calculation package needs to document both the center of the lot and the property perimeter before the submittal goes in.
WHAT YOU RECEIVE
Your parking lots photometric package.
01
Site plan overlay showing pole locations, fixture orientation, and mounting data
02
Point-by-point foot-candle grid across drive aisles, stall fields, and pedestrian routes
03
Iso-footcandle contours showing illumination falloff across the site
04
Property-line light trespass calculations and perimeter checks
05
Fixture schedule with distribution, wattage, mounting height, and cut sheet references
06
BUG and cutoff documentation where required by the jurisdiction
07
Jurisdiction-specific compliance summary for the permit set
08
Two revision rounds to address review comments or fixture updates
All plans modeled in AGi32 using IES LM-63-19 photometric data files.
APPLICABLE STANDARDS
Code references for parking lots lighting.
- ANSI/IES RP-8-25
- Current IES recommended practice for roadway and parking facility lighting, including parking areas and obtrusive-light considerations.
- SeaTac SMC 17.24.020
- District 1 and 2 parking lots: 0.5 fc minimum, 7.5 fc maximum, 15:1 uniformity. District 3 and 4 parking lots: 0.2 fc minimum and 3 fc maximum.
- Bonney Lake MMC 18.29.080
- Dark-sky compliant fixtures are required, and rear or side property lines next to residential or rural uses may not exceed 0.1 fc.
Scoped to your parking lots project.
Every parking lot plan is scoped to your site conditions and jurisdiction requirements. Send your site plan and we'll confirm the scope and fee, typically same day. No obligation.
Learn about our pricing model →Need a Parking Lot Lighting Submittal?
Send the site plan and fixture intent. We'll return a permit-ready parking lot photometric package built for code review.