Light Level or Illuminance is the total luminous flux incident on a surface per unit area. The area - the work plane - is where the most important tasks in the room or space are performed. Illuminance is measured in foot candles ftcd, fc, fcd in the Imperial system or lux in the metric SI system. The outdoor light level is approximately lux on 5000k Landscape Light Machine a clear day.
In a building in the area closest to the windows the light level may be reduced to approximately lux. In the middle area it may be as low as 25 - 50 lux. Additional lighting is often necessary to compensate low levels. According EN Light and lighting - Lighting of workplaces -Indoor work places, the minimum illuminance is 50 lx for walls and 30 lx for ceilings.
Earlier it was common with light levels in the range - lux for normal activities. Today the light level is more common in the range - lux - depending on activity. For precision and detailed works the light level may even approach - lux. Luminance is the only basic lighting parameter that is perceived by the eye. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro.
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Illuminance - Recommended Light Level Recommended light levels - illuminance - for some types of working activities Sponsored Links. Privacy We don't collect information from 500 Lumen Landscape Light Factory our users. Citation This page can be cited as Engineering ToolBox, Illuminance - Recommended Light Level. Modify access date. Scientific Online Calculator. Areas with traffic and corridors - stairways, escalators and travelators - Landscape Lighthouse 500 lifts - storage spaces.
Normal office work, PC work, study library, groceries, show rooms, laboratories, check-out areas, kitchens, auditoriums. Detailed drawing work, very detailed mechanical works, electronic workshops, testing and adjustments. Performance of visual tasks of low contrast and very small size for prolonged periods of time.
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