1. Lighting brightness
The evaluation of urban lighting brightness is based on the combination of brightness or illuminance indicators. The brightness (illumination) range of urban functional lighting is relatively fixed, and the gap is small, such as 5~50 lx, while the brightness (illumination) range of urban landscape lighting is relatively large, from a few lx to hundreds or even thousands of lx.
Objectively speaking, due to the local performance needs of some landscape lighting carriers, the brightness of the lighting source must be improved. The premise is:
1. No energy waste,
2. Does not cause light pollution,
3. Does not affect the lighting effect,
4. Do not exceed the specification (LPD value).
2. Lighting color
The lighting color should conform to the urban color planning and urban regional characteristics, and be determined according to the functional characteristics of the lighting object and the place of use. The use of lighting colors should be simple but not monotonous, rich but not cluttered; on the premise of highlighting the main color, colored light should be used for embellishment in an appropriate range and place to increase the ornamental value of landscape lighting. Different from urban functional lighting, the rational application of colored light just reflects the characteristics of urban landscape lighting. While opposing the one-sided pursuit of multiple colors in the construction of urban landscape lighting, attention should also be paid to preventing the dull and monotonous colors of urban landscape lighting. There is a stubborn, indiscriminate preference or dislike for a certain lighting source color (such as green, blue, etc.). In this regard, the color of the lighting source itself is not good or bad. The question is whether the setting of the light source is suitable for the environmental atmosphere and whether it conforms to the viewing customs of citizens and tourists. The different colors of each lighting source have their applicable scope and places.
3. Dynamic changes
The lighting dynamic effect should be moderate and rhythmic. It is necessary to determine dynamic or static lighting methods according to the functional characteristics of different environmental places to enhance the expressiveness and appreciation of landscape lighting, and create different landscape lighting atmospheres in peacetime and festivals. For example, in commercial streets, restaurants, entertainment venues, etc., dynamically changing landscape lighting facilities can be appropriately set, while in residential areas, office areas, traffic areas and other places, it is not appropriate to set dynamically changing lighting sources to prevent and reduce Light disturbance and pollution.