Illumination Levels
There is no specific guidance for external plant areas in the CIBSE: SLL Lighting Guides, but there are correlating applications.
Extract from CIBSE: SLL Lighting Guide 1 - Industrial Environment 2018
| Application | Maintained illuminance (lux) |
|---|---|
| Section 4.5 Security Lighting | |
| Medium Risk Areas | 20 lux minimum maintained illuminance, uniformity 0.4 (min/average) |
| High Risk Areas | 50 lux minimum maintained illuminance, uniformity 0.4 (min/average) |
In areas where close work is needed, an illumination level as high as 200 lux may be needed. This is often achieved using local task lighting.
Choice of Luminaire
The %Mercian% is ideal because it offers excellent vertical illumination for locations with lower mounting heights.
The %A-Line% and %Thoroproof% can be mounted on the support infrastructure to provide higher illumination levels where needed. Both have external fixing options, so can be installed easily without compromising the IP rating.
