{"product_id":"lighting-design","title":"Lighting Design","description":"\u003cp\u003eLighting is the building system most visible to the occupant and the least calculated in design. Most of what gets built is chosen by habit, or by a program in which a button is pressed without understanding what it computes. This guide builds the calculation from the start: from luminous flux to the number of luminaires in the ceiling, and from the code criterion to what is measured on site after handover. The photometric quantities and what each one measures, the criteria for illuminance, uniformity, glare and colour, the properties of luminaires with their efficacy and life, the lumen method with room index and maintenance factor, spacing and uniformity, point-by-point calculation, emergency and escape lighting, exterior and road lighting, then controls and lighting power density. 10 fully worked examples, every number checked. To EN 12464-1 · CIBSE Code for Lighting, EN 1838 · EN 50172 · NFPA 101, CIE 115 · CIE 150 · IES RP-8. 33 pages · Level EL 200 · Revision A. Whoever owns revision A receives every later revision free.\u003c\/p\u003e","brand":"Benchmark Guides","offers":[{"title":"Default Title","offer_id":67598716240084,"sku":null,"price":49.0,"currency_code":"SAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0856\/0459\/7972\/files\/BG-ELE-209-EN_cover.jpg?v=1790663044","url":"https:\/\/benchmarkguides.com\/products\/lighting-design","provider":"Benchmark Guides","version":"1.0","type":"link"}