• Each light source should have a clear purpose
and be compatible with the requirements of its
surroundings (nature or residential, urban or
industrial areas)
• Light should only be directed to where it is needed –
taking into account all relevant regulations
• The illumination should be no brighter than
necessary and should be integrated into a demand-
based control system
• Glare, stray light and light emission to the sides and
above the luminaires should be avoided
• In natural surroundings in particular, planning and
implementation should include preferably shielded
light points close to the ground wherever possible
The guidance described below plays a key role and forms the basis for planning ecologically and economically balanced,
responsible outdoor lighting that protects the night sky. Specific local requirements and regulations must be taken into
account as early as the planning phase:
• If possible, warm light colours should be used,
i.e. colour temperatures of 3000 Kelvin or less due
to their reduced blue light content
• The colour spectrum must be adapted to the
respective season and other requirements specific
to the environment
• The higher the protection class of the luminaires,
the better they will be protected against the ingress
and subsequent death of insects
• A low surface temperature of the luminaires prevents
unnecessary heat emission and protects animals in
their vicinity
Principles of efficient
ecological illumination
4
