LEED Analysis | LEED India | LEED certification | LEED documentation | LEED simulation | energy simulation analysis

Description

Light pollution is excessive or obtrusive artificial light that disrupts ecosystems and has adverse health effects. This analysis aims to quantify the level of light pollution. It covers the following aspects.

Light trespass: Illuminance values at certain site physical locations
Over Illumination: Evaluation of areas exceeding the suggested lighting power density
Sky Glow: Brightening of sky caused by outdoor lighting and natural atmospheric and celestial factors

Inputs

The typical inputs required to undertake the analysis are:

Site Plan and Building Elevations

Site Color Render View

Interior and Exterior Lighting Plan

Interior and Exterior lighting Schedule

Photometric File of each Luminary

Outputs

The typical outputs generated from the analysis are graphical and tabular representations of:

Lighting power density for exterior
Light trespass for exterior lighting
Sky glow
Interior lighting analysis for light pollution

Tools & Approach

DIALux 4.6 for light trespass analysis
Photometric viewer 3.3.0.2 for sky glow analysis
Model is directly created in DIALux using 2D plans and elevations provided
Photometric file in IESNA format is imported for analysis
Revit

Relationship to LEED^® Credits

USGBC LEED^® offers Light pollution reduction credit under the Sustainable Site category requiring the design LPD not exceeding 80% for exterior areas and 50% for landscape and building facade as define in ASHRAE 90.1. Light trespass and sky glow requirement are to be met as per IESNA classified zones. Ensure that interior lighting are not creating any exterior light pollution OR ensure automatic controls are installed to turn off lights during non-business hours.

Consulting Support

The analysis can be executed multiple times for various design configurations or application of different light fixture and their location on site.