The use of architectural night lighting methods depends on the texture, image, volume, scale, color and required lighting effects of the subject, the location of the viewing and the relationship with the surrounding environment. Lighting techniques generally include the looming, suppressing, shading, rhythm, fusion, flow, and color coordination of light. Among various lighting methods, the number, position and projection angle of floodlights are key issues.
Wuzhen Scenic Spot Floodlighting Project
As shown in the following figure: shows the body shape of different illuminated objects, the lighting effects produced by the different viewing orientations (A) and the number, position and projection angle of different floodlights (B). In general, the effect of enhancing the stereoscopic effect can be obtained by projecting the divided group of floodlights in the same direction to the illuminated object, or projecting from the two directions in contrasting tones.
At night, the visibility of architectural and sculptural details depends primarily on the brightness, so floodlights can be placed remotely or closely, as needed, or they can be exposed or hidden. Long-range projection can improve the uniformity of brightness; close-range projection can emphasize the details and texture of the illuminated surface. For the entire illuminated surface, when the average brightness of the upper portion is 2 to 4 times lower than that of the lower surface, the observer can be made to have a feeling that the upper and lower brightnesses are equal.
How to prevent glare in floodlighting
The main factors causing glare are: the brightness of the light source; the position of the light source; the contrast with the surrounding lighting environment; the size and quantity of the light source, so how to control the uncomfortable glare in the flood lighting design? In some street shops in some cities, it is often seen that signboards and advertising signs use floodlighting, but the contrast between the brightness of the selected lamps and the surrounding environment is too large, the angle is not properly installed, and the surface of many signs is mirrored. Caused by discomfort glare, so in the lighting design of signboards and advertising signs, it is necessary to consider the surrounding lighting environment, the illumination of the signboard is generally 100 ~ 500lx.
In order to ensure better uniformity, the interval between the lamps on the signboard and the billboard should be 2.5 to 3 times the length of the bracket. If the interval is too wide, a fan-shaped bright area will be generated. If side lighting is used, consider the occlusion of the luminaire so that the unwanted light is reduced as much as possible. In floodlighting of buildings, it is basically that the lamps are illuminated from the bottom up, which is less likely to cause glare.
Installation location of floodlighting fixtures on buildings
Shanghai Sanshan Guild Hall: The spotlights are evenly distributed along the old and new pavilions. The floodlighting at night makes the old pavilion's century-old vicissitudes and the new pavilion crystal clear, and it shines in the night sky.
In the decorative lighting of a building, the building art is fully embodied with as much light as possible, with little or no uncomfortable glare. In the design of floodlighting of buildings, the light source and luminaire should be selected according to the material, smoothness and shape of the building surface. The position of the luminaire is installed as close as possible to the back of the store or the decoration, so that the luminaire avoids people's sight, but the overall lighting effect must be considered and the shadow cannot be caused. In the case where the line of sight cannot be avoided, the luminaire should not be destroyed as much as possible.
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