American Lighting Association

Association Francaise de l'eclairage

BEGA

Beghelli

Campaign for dark skies

CIBSE. - UK

CIE

Cielo Buio

Conchiglia S.p.A.

Disano

Danish Illuminating Engineering Society

Energy Efficient Lighting Association

ERCO

European Lighting Designers Association

GE General Electric

iGuzzini

Home Page

Illuminating Engineering Society of North America

Illumination Engineering Society of New York

Inter - Light Oregorn U.S.A.

International Association for Energy-Efficient Lighting

International Association of Lighting Designers

International Commission on Illumination

International Dark-Sky Association (IDA)

International Electrotechnical Commission

International Standards Organization

Lombardo

Los Angeles Designers Lighting Forum  Catalog...

LUXO

Martini

Nobile Illuminazione

National Association of Electrical Distributors

National Association of Independent Lighting Distributors

National Association of Lighting Management Companies (NALMCO)

National Council on Qualification for Lighting Professions

National Electrical Contractors Association

National Electrical Manufacturers Association

National Lighting Bureau

Ova

Philips

Prisma

Professional Lighting and Sound Association (UK)

SELCI

Siderpali

Society of Television Lighting Directors (UK)

Targetti

The Royal Astronomical Society of Canada Light Pollution Abatement Program