18431_Wila Main Catalogue.pdf - Sill Lighting

Quality CriteriaRadiant Intensity and Direct and Reflective Glare10 - 100010 - 100010 - 100010 - 50030 - 80100Allowed luminous intensity ranges in cd/m 2 for a maintenance value of the horizontal illuminance ofE h = 500 lx with a positive contrast display, background luminance of the monitor ~ 100 cd/m 2Untrue colour representation ofa linear distribution of luminanceLuminance PlanningLight is invisible and only recognisablein interaction with the material itilluminates. The abstract, invisiblesize of the illuminance defines theamount of light. What we perceive asthe impression of luminosity is actuallythe light reflected from the material:the light density. Light hits an object,is radiated off it in a changed formand thus contains all the visualinformation about the object. It isthus of great importance to qualitativelighting planning.Luminance and materialsThe light technical interaction betweenthe intensity of illumination and thecolours and surfaces of furniture,working aids and surfaces of roomdivision influence the perception of lightenormously and decide whether thesurroundings are experienced asfriendly or unpleasant. Thus, with theemployment of high-gloss materials,high pointed differences of luminanceare created that are in addition onlyvisible under certain angles. Dull oropaque materials produce softtransitions of light, light-colouredmaterials produce higher radiantintensities than dark materials.Recommended mean reflectionfactors forthe ceiling 0.7 to 0.9the wall-mounted 0.5 to 0.8the floor 0.2 to 0.4work surfaces,furniture and devices 0.2 to 0.5ReflectanceConstruction mat.ρStructural glazing 0.07Brick, red 0.15Oak, dark 0.15Walnut, dark 0.20Concrete 0.30Oak, light 0.40Maple, birch 0.60Tile, white 0.70Plaster (Gypsum) 0.80Recommended properties of glossfor surfaces, furniture and appliancesDegree of glossCorresponds to a 60°,reflectometer value ≤ 20matt tosatin finishedColoursρblack 0.05dark red 0.10medium grey 0.20light brown 0.30light grey 0.40sky blue 0.40pink 0.45light green 0.45light yellow 0.70white 0.80340 WILA