City of Cambridge Lighting Ordinance Kick-Off Meeting

Light Trespass

Photograph courtesy of Carl Gardner M.Sc. Senior consultant, ‘Urban Lights’ research project, Bartlett School of Architecture, University College London

Sky Glow

Glare

Government of Hong Kong Obtrusive Lighting Study http://www.enb.gov.hk/en/resources_publications/consultancy_studies/

A

(Light emitting

luminaire in thedirectiion 90° from

85°

90°

surface area of the

downward vertical)

L

(Greatest (average)

luminance in the direction between

85° and 90° from

downward vertical)

Glare from this luminaire = L A

Luminaire

0.5

Shanghai Urban Environmental Lighting Regulations

Japan Ministry of Environmental Light Pollution Control Guidelines

Australian Standard AS 4282 Control of the Obtrusive Effects of Outdoor Lighting

Institute of Lighting Engineers (UK) Guidance Notes for the Reduction of Obtrusive Light GN01

Outdoor Site Performance (OSP) Method Lighting Research Center

LEED – Light Pollution Reduction (1 Point)

IDA – IES Model Lighting Ordinance

Residential

IDA – IES Model Lighting Ordinance

Commercial

Approach •What’s bad or good? •How can it be defined? •Prescriptive or performance? •How will it be enforced?