www.pld-a.org    Professional Lighting Designers’ Association, PLDA
www. greenpages.pld-a.org    Director of Sustainability's blog, PLDA Greenpages
www.litg.de    LiTG, Deutsche Lichttechnische Gesellschaft e.V.
www.darksky.org    International Dark Sky Association
www.guerillalighting.de    Guerilla Lighting Hamburg

We recommend energy companies which supply electricity from renewable sources and invest exclusively in renewable energy. In Hamburg for example these are:

www.greenpeace-energy.de
www.lichtblick.de
www.hamburgenergie.de

We work independently of industry, which is why we don’t show here any links to manufacturers.