3 Landscape images Credit:  Alex Cherney – Terrastro
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Contribute to the Data for the Quality of our Night Sky where ever you are.

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Good Lighting Award

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Welcome to DarkSky Victoria Australia a Chapter of  DarkSky International

International DarkSkyWeek  (IDSW)  2nd – 8th April 2024

A worldwide celebration of the dark and natural night.

For many, the dark night is often misunderstood, unfamiliar, and frightening. But the natural night is filled with wonder and awe, and is critical to the health and wellbeing of our planet.

 Join us as we discover the night together and learn about the harmful effects of light pollution and what we can do to embrace the dark and save the night.

AU IDSW EVENTS

*BALLARAT In person,and online for anywhere on the planet Book now!

 Why do migratory birds need a darksky? viewing of the Night Sky afterwards

This event has a Zoom option so that anyone can participate, follow the link for more events.

*   Globe a Night activity over the IDSW  and more information for IDSW will be added soon, but you can participate any month.

Your home or business could become involved by showcasing smart lighting which which can be turned off when not in use, 100% cut off lamps so that no lighting goes up where it is not needed. Low temperature light fixtures inside homes and business which are better for human health, reducing light escaping from windows at night, to reduce light trespass, a major problem in built up areas.

*    CARRICKALINGA SA  is in the process of working towards DarkSky Community Accreditation

Book now!

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 What can you do locally towards reducing light pollution?
Dr Russell Cockman, Past President IDA Vic,  has provided an excellent presentation for anyone who would like to learn more about why we need to reduce light pollution.  

Preserving the Night Presentation

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Globe at Night

Help to Chart how Light pollution changes over the years, your input is vital to collect as many readings as possible over a large area.

Every February you can make a contribution to our local Data. (or at other times of the Year as listed)

Southern Constellations

https://www.globeatnight.org/

The main aim of IDAVic is to maintain the beauty of the night sky for generations to come and to support good lighting fixtures which are also environmentally friendly.

A current very important issue is that a number of Victorian Councils are upgrading to energy efficient lighting.

Melbourne ISS NASA 2013 8 15 This image was taken before 4000K  LED lights were rolled out.

Melbourne at night taken by Jessica Meir ISS NASA 2020 2 7  shows  4000K LED installations in  place. The above  2 images are on different scales.

IDA Vic support LED’s which are 3000K or less, preferably 2700K.

It is not surprising that Councils are looking at LED street lights as they have a number of financial benefits due to their low energy use, low maintenance costs and long lifetimes. However, they can have serious unintended environmental, ecological and health consequences so that thought and planning need to be put in before commencing a LED street lighting program.
Some Council Street Lighting policies are completely out of date. These policies need to be comprehensively revised with the inclusion of the environmental and health impacts of light at night before new lighting programs are contemplated.
The concern with LED lighting is that white-light LEDs emit a large component of blue light so that their light is referred to as blue-rich white light. Recent research in a variety of fields such as epidemiology, astronomy, land conservation and biology, as well as vision and lighting indicates potential serious consequences to such blue-rich white light at night. Unfortunately, such research seems to be generally ignored by the lighting industry.
Potential problems due to blue-rich white light at night:
Environment – the large blue component gives a greater contribution to sky glow than warmer coloured light.
Ecology – the large blue component of the light has a disturbing impact on insects and on nocturnal animals.
Visibility – due to the large blue component of the light extra glare is perceived from the street lights reducing visibility for all. This is especially the case for older people whose eyes are likely to have yellowing lenses so that much of the blue light does not reach into their eyes.
Human health – blue light at night suppresses the hormone melatonin disturbing the normal human circadian rhythm as well as the immune system. There is now considerable evidence indicating that light at night, especially blue light, is a risk factor for breast and prostate cancer.
A useful document outlining these issues is provided by IDAVic courtesy of the International Dark-Sky Association at Seeing Blue
The next roll out of LEDs should inlcude LED street lights with a warmer colour (correlated colour temperature of 3000K) in order to minimise the potentially dangerous emission of blue light in suburban streets and into the bedrooms of residents. Ideally, the street lights should include control gear that in the future, they could be dimmed or even switched off late at night when there is little pedestrian or vehicular traffic that require them.
Contact your Council to find out their plans for street lighting. If you have any questions, you can contact IDAVic at secretary (at) darkskyvic.org

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