Attachment 9- Lighting Impact Assessment

1. INTRODUCTION

Stockwell has engaged Rubidium Light to undertake an Obtrusive Lighting Impact Assessment on a
proposed retail and residential development located at 28 Eenie Creek Road Noosaville Queensland. The
objective of this assessment is to quantity the possible adverse effects of light from the proposed lighting
system in accordance with procedures as outlined in AS/NZS4282-2019 Control of the Obtrusive Effects
of Outdoor Lighting.



2. DEFINITIONS

2.1    Luminous flux
       The Measure of the quantity of light. For a lamp or luminaire, it normally refers to the total light
       emitted irrespective of the direction in which it is distributed. Unit: lumen (lm)
2.2    Luminous intensity
       The concentration of luminous flux emitted in a specified direction. Unit: candela (cd)
2.3    Luminance
       The physical quantity corresponding to the brightness of a surface (e.g., a lamp, luminaire, sky or
       reflecting material) in a specified direction. It is the luminous intensity of an area of the surface
       divided by that area. Unit: candela per square meter (cd/m²)
2.4    Illumination
       A general expression for the quantity of light arriving at a surface. The physical measure of
       illumination is illuminance.
2.5    Illuminance
       The luminous flux arriving at a surface divided by the area of the illuminated surface. Unit: lux (lx)
2.6    Reflectance
       The ratio of the total luminous flux reflected from a surface to the total luminous flux which arrives
       at the surface. Usually expressed as a decimal in the range of 0 to 1 but may also be expressed
       as a percentage.
2.7    Glare
       The discomfort or impairment of vision experienced when parts of the field of view (e.g., lamps,
       luminaires, sky) are excessively bright in relation to the general surroundings.
                                                                                                                rubidium
2.8    Luminaire
       Equipment which houses the light source and directs the light in the desired directions. It includes
       items necessary for fixing, protecting, and operating the light source.
2.9    Threshold increment (TI)
       The measure of disability glare expressed as the percentage increase in contrast required between
       an object and its background for it to be seen equally well with a source of glare present. Higher
       values of TI correspond to a greater disability glare.
2.10 Astronomical Twilight
     Astronomical twilight is defined as when the geometric centre of the Sun is between 18° and 12°
     below the horizon.
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