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[ { "title": "Have you downloaded our Lighting Catalogue yet? ", "nid": "399", "body": "\u003Cp\u003EVolume 2 of our much-anticipated \u003Ca href=\u0022https://www.magnetgroup.co.za/downloads.html\u0022\u003ELighting Catalogue\u003C/a\u003E is available for download now!\u003C/p\u003E\n\u003Cp\u003ESimply click on the image below to get your copy...\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/download/magnet-lighting-catalogue.pdf\u0022\u003E\u003Cimg alt=\u0022Download lighting catalogue\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022006058bc-9fd4-4e7a-91c7-42aa1072d597\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Lighitng%20Catalogue.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003EDoes your facility need an energy efficient lighting upgrade? Click \u003Cstrong\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za\u0022\u003Ehere \u003C/a\u003E\u003C/strong\u003Eto chat to one of our experts now!\u003C/p\u003E\n", "created": "Aug 2020", "terms": "Lighting, General" }, { "title": "The Quality of Lighting Part 2 | Spatial Distribution of Light", "nid": "398", "body": "\u003Cp\u003EThe beauty of lighting not only lies in its functionality, but also in its quality. Over the next few weeks, we will uncover the various aspects of lighting quality, including topics such as:\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003ELighting Levels\u003C/li\u003E\n\u003Cli\u003ESpatial distribution of light\u003C/li\u003E\n\u003Cli\u003EDirectionality of light\u003C/li\u003E\n\u003Cli\u003EColour of light\u003C/li\u003E\n\u003Cli\u003EEconomics of light\u003C/li\u003E\n\u003Cli\u003ELight and the environment\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003EClick\u003Cstrong\u003E \u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=Quality-of-Lighting--New-series-on-lighting\u0022\u003Ehere\u003C/a\u003E \u003C/strong\u003Efor last week\u2019s article on Lighting Levels. Watch this space to catch the full discussion!\u003C/p\u003E\n\u003Cp\u003EThis week, we\u2019re delving into the Spatial Distribution of Light.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhy is spatial light distribution important?\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EWhen light is distributed correctly within a space, a balanced luminance distribution is achieved. Appropriate\u00A0light distribution is important as our visual environment consists of a plethora of shapes, patterns, colour and brightness. These can be overwhelming and would impact visual performance and comfort if it were not viewed within a balanced luminance distribution. Factors that help in achieving a balanced spatial distribution of light include uniformity and luminance ratios, together with glare-restriction limits.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EUniformity and luminance ratios\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EIn last week\u2019s edition, we discussed lighting levels. An adequate average lighting level is not enough to ensure the proper functioning of the eye. As such, a uniformity requirement is specified in addition to the average lighting level. This is achieved in terms of a requirement for the minimum luminance on a specified plane, relative to the average luminance: Lmin/Lav.\u003C/p\u003E\n\u003Cp\u003EVisual performance and comfort suffers when there are large differences in individual lighting levels on the specified plane, as some areas on this place will be too dark relative to the overall lighting level. Hence, uniformity complements the average lighting level. Moreover, it is of equal importance to avoid the creation of light and dark spots too close to each other. The result is a \u2018zebra-effect\u2019, which is best illustrated in street lighting when posts are spaced too far apart. The repetitive sequence of light and dark areas can make driving on such a street very uncomfortable. Here, the problem can be eliminated by the specification of a minimum value for the minimum-to-maximum luminance ratio on a line parallel to the street surface.\u003C/p\u003E\n\u003Cp\u003EOn the other hand, when the luminance difference is too small it results in a monotonous visual scene as there are no point(s) of interest. In an interior space, some standards may specify both minimum and maximum luminance ratio values for larger surfaces. A requirement for comfortable luminance ratios is the careful matching of surface reflectances in the field of view.\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-left\u0022\u003E\n\u003Cimg alt=\u0022Matching reflectances\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u002268447ef8-e7a5-4bcc-852d-0f6f25dc0cf7\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Matching%20reflectances.jpg\u0022 /\u003E\n\u003Cfigcaption\u003E\u003Cem\u003EIllustration of the careful matching of surface reflectances to achieve comfortable luminance ratios\u003C/em\u003E\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-left\u0022\u003E\n\u003Cimg alt=\u0022Average lux levels and uniformity\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u00229eb160c0-5639-48de-83fb-8a35d1ab3ec7\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Lux%20levels%20diagram_1_0.jpg\u0022 /\u003E\n\u003Cfigcaption\u003E\u003Cem\u003ERecommended Average Lux Levels and Minimum Average Uniformity as per SANS10114-1\u003C/em\u003E\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat is glare? \u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EIn terms of artificial lighting, glare is the uncomfortable sensation experienced when luminances in the visual field are much greater than the luminance to which eyes are adapted. Glare can also be experienced in daylight, for example, when windows have remarkably high luminances compared with other luminances in the room. Glare can also be indirect. This takes place when light from a bright source is reflected by a glossy surface into the eyes of an observer. Again, the result is visual discomfort and irritation.\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-center\u0022\u003E\n\u003Cimg alt=\u0022Glare\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u00220ee93c87-bb2b-44ef-ad19-498f561b17c1\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/glare.jpg\u0022 /\u003E\n\u003Cfigcaption\u003EIllustration of glare and its effect on visual perception\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003ELearn more about the concept of Glare! Click \u003Ca href=\u0022https://www.youtube.com/watch?v=PwHXut8lw4M\u0022\u003Ehere\u003C/a\u003E to watch a quick video.\u00A0\u003C/p\u003E\n\u003Cp\u003EClick\u003Cstrong\u003E \u003Ca href=\u0022https://www.signify.com/global/lighting-academy/browser/webinar/spatial-light-distribution\u0022\u003Ehere\u003C/a\u003E\u003C/strong\u003E to watch a webinar discussing how dynamically modifying the three-dimensional distribution of light in a space can improve the quality of most common \u003Ca href=\u0022https://www.magnetgroup.co.za/solutions-lighting/index.html\u0022\u003Elighting solutions\u003C/a\u003E. The webinar discusses the three different approaches to this question, using daylight as the model from which to gain the relevant data.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat\u2019s next in this lighting quality series? \u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EIn the next article, we will be discussing the directionality of light which will touch on topics such as directional light, diffuse light, indirect light and light distribution of luminaires.\u00A0\u003C/p\u003E\n\u003Cp\u003EDon\u2019t miss out \u2013 subscribe to our newsletters and keep up to date on the latest technology and trends in electrical, lighting, water and solar!\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.signify.com/global/lighting-academy/browser/the-science-of-lighting\u0022\u003E\u003Cstrong\u003E\u003Cem\u003ESource: Signify \u201CThe Science of Lighting\u201D by Wout van Bommel and Abdo Rouhana (2019: second edition)\u003C/em\u003E\u003C/strong\u003E\u003C/a\u003E\u003C/p\u003E\n", "created": "Aug 2020", "terms": "Lighting, General" }, { "title": "MARS LEDRail 4-100", "nid": "395", "body": "\u003Cp\u003E\u003Cstrong\u003EMARS LEDRail 4-100 | Watch the video now!\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EThe \u003Ca href=\u0022https://www.magnetgroup.co.za/solutions-lighting/index.html#!itemdetails/name=rail%204%2D100\u0026amp;type=2\u0026amp;id=0167ae59%2D015e%2D4749%2D966e%2Def60f2fca6d0\u0022\u003EMARS LEDRail 4-100\u003C/a\u003E is a high performing and visually effective product. It can be used for general and task lighting in commercial applications, and for accurate \u0026amp; low glare illumination in retail. It is available as a recessed, semi-recessed, pendant or surface mount.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za\u0022\u003E\u003Cstrong\u003EInquire\u003C/strong\u003E\u003C/a\u003E about the full range of product variations now!\u003C/p\u003E\n\u003Cp\u003EClick on the image below to watch a quick\u00A0video on this impressive \u003Cstrong\u003EMARS product\u003C/strong\u003E!\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.youtube.com/watch?v=VpUES2wSYu4\u0022\u003E\u003Cimg alt=\u0022MARS LEDRail 4-100\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022ebdb6eb0-92bb-4d01-9bff-fb78889dada5\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/MARS%20Led%20Rail%204-100.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n", "created": "Aug 2020", "terms": "Lighting, General" }, { "title": "Quality of Lighting | New series on lighting", "nid": "393", "body": "\u003Cp\u003EThe beauty of lighting not only lies in its functionality, but also in its quality. Over the next few weeks, we will uncover the various aspects of lighting quality, including topics such as:\u003Cbr /\u003E\n- Lighting Levels\u003Cbr /\u003E\n- Spatial distribution of light\u003Cbr /\u003E\n- Directionality of light\u003Cbr /\u003E\n- Colour of light\u003Cbr /\u003E\n- Economics of light\u003Cbr /\u003E\n- Light and the environment\u003C/p\u003E\n\u003Cp\u003E\nWatch this space to catch the full discussion!\u003C/p\u003E\n\u003Cp\u003EThis week, we\u2019re delving into lighting levels...\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EUnderstanding lighting levels\u003C/strong\u003E\u003Cbr /\u003E\nLighting level or illuminance, is the amount of light measured on a plane. The work plane is where the most important tasks in the room or space are performed.\u003C/p\u003E\n\u003Cp\u003ELighting levels can range from natural illumination provided by moonlight (a few tenths of a lux) to as high as 100\u00A0000 lux (a hot summer\u2019s day). What\u2019s interesting to note is that lighting levels considered satisfactory under electric lighting, is in actual fact quite low depending on the task. The minimum requirement is based on OHASACT.\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-center\u0022\u003E\n\u003Ca href=\u0022https://www.signify.com/global/lighting-academy/browser/the-science-of-lighting\u0022\u003E\u003Cimg alt=\u0022Range of lighting levels\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022365bce04-3625-4a58-ac3b-716f8a1f8206\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/lighting%20level_0.jpg\u0022 /\u003E\u003C/a\u003E\n\u003Cfigcaption\u003ERange of lighting levels from\u00A0Signify\u0027s \u201CThe Science of Lighting\u201D\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat is the effect of lighting levels?\u003C/strong\u003E\u003Cbr /\u003E\nAdaptation, in visual physiology, is defined as the retina\u2019s ability to adjust to various levels of light. The adaptation state of the eye is determined by the lighting level. The effect of optimum lighting level is a higher adaptation state of the eye. In turn, this results in better contrast sensitivity and lowers the risk of uncomfortable glare. Moreover, when a visual task is considered quite challenging (i.e.: in terms of contrast, or size) a higher level of lighting is then required. Therefore, when a room is adequately lit with the correct lighting level, the effect is an improvement in the time it may take to perform a task, and a reduction in the risk of errors occurring.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EHow are planes used to determine lighting levels?\u003C/strong\u003E\u003Cbr /\u003E\nIn most instances, the average illuminance on the horizontal plane is used to measure lighting level. In an office, the horizontal plan of the working area will be the desk. However, there are situations where the exact working area is unknown \u2013 so, how is lighting level measured then? Where the precise working area is not known, the lighting level on an imaginary horizontal surface approximately 75 centimeters above the floor is specified. In outdoor applications, such as street lighting, the road surface is used to measure lighting level. Furthermore, the lighting of vertical objects is also of importance. An example of this instance is in retail lighting, where the proper illuminance of product on vertical shelving makes it more enticing to shoppers and therefore, more likely to be purchased.\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img\u0022\u003E\n\u003Cimg alt=\u0022The horizontal working plane in an office\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022b96e7ca6-a04d-4884-95d8-a289c18604ff\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Why-LED-Office-Lights-Are-Good-For-Business-1024x682.jpg\u0022 /\u003E\n\u003Cfigcaption\u003E\u003Cem\u003EThe horizontal working plane in an office\u003C/em\u003E\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003ETo learn more on lighting levels, click \u003Ca href=\u0022https://www.youtube.com/watch?v=NBK3HWT4zJQ\u0022\u003E\u003Cstrong\u003Ehere\u003C/strong\u003E\u003C/a\u003E to watch a quick video:\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat is Lux?\u003C/strong\u003E\u003Cbr /\u003E\nLux is used to measure the amount of lighting output in a given area. One lux equates to one lumen per square meter. Lux enables the measurement of the total \u2018amount\u2019 of visible light present and the intensity of the illumination on a surface. Here are some recommendations for adequate lux levels across various applications:\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-center\u0022\u003E\n\u003Cimg alt=\u0022Source: Recommended Lighting Levels according to SANS10114-1\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022c94301a6-b90b-411d-89c2-998f998a6598\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Lux%20levels%20diagram_1.jpg\u0022 /\u003E\n\u003Cfigcaption\u003ERecommended Lighting Levels as per SANS10114-1\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ETIP:\u003C/strong\u003E\u003Cbr /\u003E\nEnjoy the benefit of having a light meter at your fingertips. Click \u003Ca href=\u0022https://apps.apple.com/za/app/light-lux-meter/id934384343\u0022\u003E\u003Cstrong\u003Ehere\u003C/strong\u003E\u003C/a\u003E to download our recommendation for a lux light meter App (iOS).\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ELighting Standards:\u003C/strong\u003E\u003Cbr /\u003E\nThere are various national and international standards on the expansive range of outdoor and indoor lighting applications with specifications for lighting level values.\u003C/p\u003E\n\u003Cp\u003EClick \u003Ca href=\u0022https://store.sabs.co.za/pdfpreview.php?hash=d3eaf7f362bc9737b11f728b30f1fdf7b4dbef75\u0026amp;preview=yes\u0022\u003E\u003Cstrong\u003Ehere\u003C/strong\u003E\u003C/a\u003E to preview the South African National Standard for Interior Lighting, SANS10114-1:2020 Edition 4.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat\u2019s next in this lighting quality series? \u003C/strong\u003E\u003Cbr /\u003E\nIn the next article, we will be discussing the spatial distribution of light which will touch on topics such as luminance ratios and glare restriction. \u00A0\u003C/p\u003E\n\u003Cp\u003EDon\u2019t miss out \u2013 subscribe to our newsletters and keep up to date on the latest technology and trends in electrical, lighting, water and solar!\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp class=\u0022text-align-right\u0022\u003E\u003Ca href=\u0022https://www.signify.com/global/lighting-academy/browser/the-science-of-lighting\u0022\u003E\u003Cem\u003ESource: Signify \u201CThe Science of Lighting\u201D by Wout van Bommel and Abdo Rouhana (2019: second edition)\u003C/em\u003E\u003C/a\u003E\u003C/p\u003E\n", "created": "Aug 2020", "terms": "Lighting, General" }, { "title": "MARS - Find these products and more in our Lighting Catalogue", "nid": "388", "body": "\u003Cp\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/download/magnet-lighting-catalogue.pdf\u0022\u003E\u003Cimg alt=\u0022MARS - lighting catalogue\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u00220cff584b-d19a-434a-bb51-5a83564ec5eb\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/3.%20MARS.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n", "created": "Dec 2019", "terms": "Lighting, General" } ]