FLOOD & AREA LIGHTING
Consider safety, vandal resistance, security, light pollution, glare avoidance, operating cost, convenience and effectiveness. Luminaires can be mounted on buildings, poles or the ground; often special brackets or structures have to be made.
Types of Light Distribution
Symmetric Light: is distributed uniformly below a luminaire such as a bollard.
Asymmetric Light: is concentrated uniformly to one side of the fixture such as signage lights.
Directional Light: is projected in a defined direction e.g. flood lights.
Multi Directional Light: is distributed equally in all directions, such as pole mounted globes.
A lot of light can be ‘lost’ so a high utilisation factor cannot be expected. There will also be a much greater variation in uniformity (compared to interior lighting) often up to 15:1 over the lit area. Spacing to pole height ratios is typically 3:1 or 4:1.
Typical Lux Levels Achieved
1 – 10 LUX Storage areas and car parks
10 – 50 LUX Industrial yards, work areas
50 – 150 LUX Devanning areas, petrol stations
Refer to Bulkhead page for material selection and maintenance guidance.