Now Wädenswil has lamps, some of the smart Road. As the ID (elektrizitätswerke des Kantons Zürich) is reported to have been taken at the Seestrasse twelve candelabra in operation, the strength of its light traffic volume adjust.
Wädenswil is in addition to Urdorf and Neftenbach is the third municipality with transit roads, where the light is dimmed, when few cars are on the road: In Urdorf the road to a section of the Birmensdorf. In the rain village and other Zurich municipalities, there are street lanterns with anticipatory light. There is not fully untwisted LED react-lights when a car approaches. You will be brighter.
More than save electricity
Originally, such requirements were designed-oriented street lighting to save electrical energy. A joint study of the Swiss Federal research Institute WSL, and the EKZ shows now, but even that dimmed light roads also has environmentally positive. The road will be dimmed lights, you will attract less insects.
EKZ operate on a cantonal road in the rain village 33 demand-controlled LED lights. (Video: EKZ, June 2015)
night-active insects to lose in the case of strong artificial light sources, the orientation, because this is their natural orientation points, the stars, outshine. So you are attracted about from street lamps to magical. You have to fly in a spiral on you and circle around you to the point of exhaustion.
contribution against light pollution
“A dim road lighting is, therefore, an effective contribution against the impact of the undesired light emission,” says study leader Janine Bolliger. She is a researcher at the WSL.
To find out, whether the dimmable lights have an effect on insects and bats to fit the EKZ, the lighting of ten candelabra in Urdorf and Regensdorf during 32 nights: Alternately, the lights were dimmed a week and a week turned up full. The night insects were mounted traps. The activity of the bats was determined by MICS, the ultrasonic signals recordings.
Good for bugs and ants
that in the first place, the weather affects the number of insects and bats: The warmer and drier, the more animals were captured turned out. According to Janine Bolliger significantly less insects into the trap, when the light was dimmed. It flew so less insects to the candelabra.
benefited, However, bugs in the first place, and Hymenoptera, including the ants. Flies, mosquitoes, and beetles were less sensitive to light. The dimmed light had also effect on the bats. Bats Orient themselves mainly with ultrasound and echolocation, but are not blind.
Important dark corridors
Here was true: The more insects to the light fixtures were present, the higher the level of bat activity was. So the more frequent species, which followers find their way as a Culture in the settlement area, in the cone of light that attracts the insects to hunt. For rarer species of bat, the dimmed lighting is still too bright.
Large mouse-eared bat: For a number of rare species, even in the dim light to bright. Image: Foundation bat conservation (Hans-Peter Stutz)
The theme is in order for the researchers from the WSL and the lighting expert, the EKZ is not checked, because the current study can only make statements about the effect of the light intensity. But also the light temperature or color of light and the shape of the lights may affect the behaviour of nocturnal animals.
Janine Bolliger: “The less bright road trains could act like dark corridors and the permeability of heavily populated areas for night-active organisms increase.”
Janine Bolliger & a.: study on the effects of the LED street light-temperature on the incidence of insects and bats. (WSL/EKZ). (Tages-Anzeiger)
Created: 28.01.2019, 12:04 PM
