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My council replaced the street lighting with unshielded 4000K LED's which had a noticeable negative impact on light pollution. I managed to get a shield installed on my closest lamp and it made a big difference to my backyard by preventing direct illumination (see image attached: the grey rubber parts are inserts which fit inside the clear cover).
The shield also cut front yard illumination by about half.
If Brisbane council is ignoring current requests for responsible lighting perhaps locals could ask for shields to be included at the time of installation of the new LED's. Shields still allow for direct illumination of the road and footpath but reduce light trespass onto resident's properties. There a different types of shields; you'd need to find out which lamp model is being installed, look up the shield models for that lamp and request the shield which best prevents light trespass onto properties.
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