Aiming luminaires is a mounting function. Many arears are subject to high winds ranging above 100mph. This requires careful consideration of the lamp’s structural strength and capacity of mounts that can include U-brackets, slip-fitters, flat-mounts, and other configurations. Check for wind ratings if available and try to see a sample.
These are general slope guidelines that do not pertain to specialty lighting situations like terrain parks, mogul runs, jumps, halfpipes, and even aerial slopes. These applications will be reviewed in later sections . 4. Understanding Ambient Light and Effective Zero Sustainable lighting design must account for natural and artificial ambient light to avoid over-illumination and reduce energy waste: • Ambient Light: Natural sources, like moonlight, can provide up to 0.3 lux on snow-covered mountains, amplified by snow’s high reflectivity. Artificial sources, such as nearby streetlights, also contribute. • Effective Zero : In photometric studies, "effective zero" occurs when artificial light’s impact drops below 0.25 lux, blending with ambient levels. Designers should minimize artificial output in areas where ambient light suffices, reducing energy use and light pollution. In addition to natural ambient light, accurate photometric
studies may indicate the effects of surrounding artificial light sources such as street lighting or neighboring buildings. The combined impact of natural and ambient light will almost always be greater than 0.2 lux. This means that the effective range of a light source becomes zero when expected reflected levels drop to approximately 0.25 lux or less. This is generally referred to as “effective zero” since it is impossible to attain an
absolute reading of zero. When a 0.0 reading is displayed on a photometric layout, it usually means the area is beyond the data scope . Therefore, no reading is generated by the computer model. In residential areas, readings below 1.0 lux are considered ambient light. This implies that there is no net increase in light being generated by an artificial source, even if the specific light source like a street lamp is visible. Leveraging snow’s reflectivity allows lower artificial light levels , enhancing sustainability without compromising visibility.
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