Lighting Assessment WAI-985-000-REPLC-0019_Rev 0.Docx Waihi North Project Page 33 of 35 21/06/2022 Assessment of Environmental Effects: Lighting REVISION: 0 - Final Lighting proposed by Waka Kotahi for the Willows Road / State Highway 25 intersection, would be expected to be of flat-glass (zero upward light component) design which should minimise glare effects. 3.8.3 Sky Glow Effects Generally, whenever luminaires are installed with their light producing faces aimed above the horizontal, there is the potential to produce direct sky glow effects. Mobile construction lighting as shown in Figure 6, will produce direct sky glow which could be visible from several hundred metres away. The effects will depend upon the viewing location and the backdrop to the area being viewed. With respect to the Willows Road SFA, from viewing locations towards the backdrop of the unilluminated farmland and Coromandel Forest Park, this effect would be more than minor with no mitigation employed. With respect to the GOP, NRS, Processing Plant, and TSF3, whilst sky glow would be expected to be generated – particularly by mobile lighting plant – the location adjacent to the existing mine facilities and the Waihi township should result in less than minor effects. Reflected light from luminaires would produce sky glow in varying amounts depending upon the situation. Light would be reflected from the ground below the luminaires - with greater reflection in wet conditions, with light concrete ground construction, and less reflection with darker asphalt construction. Reflected light into the atmosphere would also occur in misty and foggy conditions – exhibiting as halos of light around the luminaires. Vehicle head, task, and security lighting could contribute to the skyglow effects seen from outside of the site. The effect will depend upon the location of the source and the viewing location. It might be expected that the duration of such lighting, and hence the effects, would be short relative to the other forms of lighting on the site as vehicles might be expected to move through the site rather than remaining stationary for extended periods. Increased duration of sky glow effects would be expected where vehicles were undertaking construction and operational task requiring them to remain in an area for an extended period. Lighting proposed by Waka Kotahi for the Willows Road / State Highway 25 intersection, would be expected to be of flat-glass (zero upward light component) design which should minimise direct sky glow effects. 3.8.4 Potential Mitigation Measures To minimize effects to neighbours, where luminaires are visible from external locations or are high output floodlights, they should be configured as follows: • Selection of appropriate luminaires for purpose (e.g. asymmetric vs symmetric, appropriate lumen outputs, warm colour temperature, sensor-activated, glare shields) • Installed such that their light producing faces are horizontal to the ground and not directed against reflective surfaces such as walls/roofs, • Luminaires aimed away from external locations i.e., into the site,
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