The conference is dedicated to the problem of light pollution, defined as:

• the burdensome impact of artificial light, caused by its excessive or improper use,
• any negative impact of artificial lighting, as: blinding, light tresspassing, overlighting, reduced visibility due to a faulty lights, sky glow and the waste of energy,
• change the level of lighting in the environment under the influence of an artificial light,
• direct or indirect introduction of artificial light into the environment.