To increase night sky access, improve nighttime visibility, and reduce the consequences of light pollution for wildlife and people.
增加夜空可见度、提高夜间能见度，并降低光污染对野生动物和人类的影响。
Meet the following requirements for exterior lighting, upward light emission, and interior lighting:
满足以下关于外部照明、上射光和内部照明的要求：
All exterior luminaires must be classified according to IES TM-15-11 (Addendum A) for backlight (B), uplight (U), and glare (G). Use the five-zone classification system (LZ0–LZ4) based on the project's lighting zone.
所有外部灯具必须根据IES TM-15-11（附录A）进行后射光(B)、上射光(U)和眩光(G)分类。基于项目所在照明区域使用五区分类系统(LZ0–LZ4)。
| Lighting Zone / 照明区域 | Description / 描述 | B Rating | U Rating | G Rating |
|---|---|---|---|---|
| LZ0 | No ambient lighting / 无环境照明 | B1 | U0 | G0 |
| LZ1 | Low ambient lighting / 低环境照明 | B2 | U1 | G1 |
| LZ2 | Moderate ambient lighting / 中等环境照明 | B3 | U2 | G2 |
| LZ3 | Moderately high ambient lighting / 中等偏高环境照明 | B4 | U3 | G3 |
| LZ4 | High ambient lighting / 高环境照明 | B5 | U4 | G4 |
Do not exceed the maximum percentage of total luminaire lumens emitted above horizontal, as specified in Table 2.
不得超过表2规定的水平面以上总灯具流明最大百分比。
| Lighting Zone / 照明区域 | Max Uplight / 最高上射光 |
|---|---|
| LZ0 | 0% |
| LZ1 | 0% |
| LZ2 | 1.25% |
| LZ3 | 2.5% |
| LZ4 | 5.0% |
Meet IES TM-11-11 requirements for light trespass. Maximum allowable vertical illuminance at the property line is specified in Table 3.
满足IES TM-11-11对光侵扰的要求。表3规定了地块线上最大允许垂直照度。
| Lighting Zone / 照明区域 | Max Vertical Illuminance / 最高垂直照度 |
|---|---|
| LZ0 | 0.05 fc (0.5 lux) |
| LZ1 | 0.05 fc (0.5 lux) |
| LZ2 | 0.10 fc (1.0 lux) |
| LZ3 | 0.20 fc (2.0 lux) |
| LZ4 | 0.60 fc (6.0 lux) |
All nonemergency interior lighting that can be seen from exterior must be automatically controlled to turn off during nonbusiness hours.
所有从外部可见的非紧急内部照明必须在非营业时间自动关闭。