Lighting Assessment WAI-985-000-REPLC-0019_Rev 0.Docx Waihi North Project Appendix B Page 2 of 2 21/06/2022 Assessment of Environmental Effects: Lighting REVISION: 0 - Final LUMINAIRE The international term for a lighting fitting, which is the assembly that contains a light source and distributes the light output. LUMINANCE The measure of brightness, which is a function of concentration or density of luminous intensity (i.e. Candelas) in a given direction per unit area, measured in Candela/m² (Cd/m²). LUX The SI unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is equal to one lumen per square metre. SKYGLOW The brightening of the night sky that results from radiation (visible and non-visible), scatter from the constituents of the atmosphere (gaseous, molecules, aerosols and particulate matter), in the direction of observation. It comprises two separate components as follows: Natural Sky Glow: That part of the sky glow that is attributable to radiation from celestial sources and luminescent processes in Earth’s upper atmosphere. Artificial Sky Glow: That part of the sky glow that is attributable to man-made sources of radiation (e.g. outdoor lighting), including radiation that is emitted above the horizontal and radiation that is reflected from the surface of the earth. SPILL LIGHT Light emitted by a lighting installation that falls outside of the design area. Spill light may or may not be obtrusive depending on what it affects.
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