Uniformity may be a challenge for heavy industry lighting installations due to large equipment that may block the light. Unwanted shadows from machines should be taken into consideration when planning the light. Good vertical illumination makes instruments easy to read and additionally aids navigation and movement on stairways and in tall rooms.
Corrosion-resistant luminaires with proper ingress protection need to be used for areas at risk of condensation. Vision may be impaired by dust, smoke or vapours, so higher light levels are needed in heavy manufacturing areas with occasional or continuous manual operation. This can be achieved in a cost-effective way by using energy-efficient LED luminaires, which also offer better colour rendering and often work well even in operating temperatures of as much as 60°C.
The work in heavy manufacturing plants can get very specific on constantly manned workplaces such as control rooms or operating rooms. This requires proper task area lighting – either with the use of arm-based task lights or linear lights above the workstations.
Industrial activities and crafts – Rolling mills, iron and steel works
| Type of task / activity area |
Lux-level (Em) |
Glare rating (UGRL) |
Uniformity (U0) |
Colour rendition (Ra) |
Em,z | Em,wall | Em,ceiling | Specific requirements |
|
| required | modified | U0 ≥ 0,10 | |||||||
| Production plants without manual operation | 50 | - | - | 0,40 | 20 | - | - | - | Safety colours shall be identifiable. |
| Production plants with occasional manual operation | 150 | 200 | 28 | 0,40 | 40 | 50 | 50 | 30 | |
| Production plants with continuous manual operation | 200 | 300 | 25 | 0,60 | 80 | 50 | 50 | 30 | |
| Slab Store | 50 | - | - | 0,40 | 20 | - | - | - | Safety colours shall be identifiable. |
| Furnaces | 200 | 300 | 25 | 0,40 | 20 | 50 | 50 | 30 | Safety colours shall be identifiable. |
| Mill train: coiler: shear line | 300 | 500 | 25 | 0,60 | 40 | 75 | 75 | 30 | |
| Control platforms: control panels | 300 | 500 | 22 | 0,60 | 80 | 75 | 75 | 30 | |
| Test, measurement and inspection | 500 | 750 | 22 | 0,60 | 80 | 150 | 150 | 100 | |
| Underfloor man-sized tunnels: belt sections, cellars, ect. | 50 | - | - | 0,40 | 20 | - | - | - | Safety colours shall be identifiable. |