{ "type": "mediaitem", "identifier": "mediaitem_2112", "subtype": "wmammodularcontent_gkn_dossier", "title": "LED-belichting in de glas­tuinbouw", "navtitle": "", "url": "/nl/groenkennisnet/dossier/led-belichting-in-de-glastuinbouw-dossier", "language": "nl_NL", "sections": [ { "identifier": "pagesection_145298", "title": "GKN Configuratie", "link": "/nl/groenkennisnet/paginasectie?pagesectionid=145298&tsobjectid=145298" }, { "identifier": "pagesection_145419", "title": "GKN Menu", "link": "/nl/groenkennisnet/paginasectie?pagesectionid=145419&tsobjectid=145419" }, { "identifier": "pagesection_145379", "title": "GKN Footer logo's", "link": "/nl/groenkennisnet/paginasectie?pagesectionid=145379&tsobjectid=145379" }, { "identifier": "pagesection_145248", "title": "GKN Footer", "link": "/nl/groenkennisnet/paginasectie?pagesectionid=145248&tsobjectid=145248" }, { "identifier": "pagesection_145401", "title": "GKN Footer legal", "link": "/nl/groenkennisnet/paginasectie?pagesectionid=145401&tsobjectid=145401" } ], "metadata" : { "id": 18697, "identifier": "mediaitem_2112", "contenttype": "wmammodularcontent_gkn_dossier", "contenttype_title": "contenttype_wmammodularcontent_gkn_dossier", "url": "/nl/groenkennisnet/dossier/led-belichting-in-de-glastuinbouw-dossier", "title": "LED-belichting in de glas­tuinbouw", "lead": "In de tuinbouw wordt al jaren mede dankzij belichting het donker teruggedrongen en het groeiseizoen verlengd. Met als resultaat een jaarrond hogere productie van producten van dezelfde constante kwaliteit. \nVoor de belichting wordt steeds vaker LED-lapen gebruikt in plaats van SON-T lampen. Dat heeft alles te maken met de hogere efficiency in lichtopbrengst, de langere levensduur en de grotere mogelijkheden tot het samenstellen van gewasspecifieke lichtrecepten.", "leadimage": { "source": "https://api.groenkennisnet.nl/upload_mm/e/2/7/2974_fullimage_greenhouse-gc37b82067_1280.jpg", "width": 1280, "height": 853, "focuspoint-x": 649, "focuspoint-y": 331, "alternative_text": "Sierteelt - Driesel via Pixabay", "photographer": "Driesel", "photographer_hyperlink": "https://pixabay.com/nl/users/driesel-4260712/", "photo_license": "Pixabay License", "photo_license_hyperlink": "https://pixabay.com/nl/service/license/", "source_info": "Pixabay", "source_info_hyperlink": "https://pixabay.com/nl/photos/broeikasgassen-kwekerij-bloemenbed-4948726/", "keywords": [ "sierteelt", "kas", "bloemen", "tuinbouw" ] }, "publication_date": "2021-08-12T10:45+02:00", "lastmodified_date": "2026-03-19T13:47+02:00", "expiration_date": "", "tags": [ "gkn_home", "gkn_glastuinbouw", "Dossier", "Dutch", "gkn_plant", "gkn_greenport" ], "copyright": "", "external_id": "", "item_metadata": { "contentsubtype": "Dossier", "theme": [ "gkn_glastuinbouw", "gkn_greenport", "gkn_home", "gkn_plant" ], "keywords": [], "video_header": "https://www.youtube.com/watch?v=v9FO1Y5iNB0", "gkn_organization": { "title": "Groen Kennisnet", "url": "/nl/groenkennisnet/nieuwsitem/groen-kennisnet-organisatie" }, "contactperson": { "title": "Redactie Groen Kennisnet", "url": "/nl/groenkennisnet/nieuwsitem/redactie-groen-kennisnet" }, "experts": [], "link_extra_image": "", "last_update": "2026-01-22T00:00+02:00" } }, "contents": [ { "area": "beginhier", "title": "Begin hier", "contentarea_template": { "id": "contenttemplate_dossier", "name": "contenttemplate_dossier"},"background": false,"contentarea_leadtext": "","image": { "source": "https://api.groenkennisnet.nl/upload_mm/f/5/7/4272_fullimage_office%20use%20150%20dpi-shutterstock_100423213_kas_chrysanthiums.jpg", "width": 1024, "height": 680, "focuspoint-x": -1, "focuspoint-y": -1, "alternative_text": "Paarse en gele chrysanten in een kas - Ruud Morijn via Shutterstock", "photographer": "Ruud Morijn", "photographer_hyperlink": "https://www.shutterstock.com/g/rmorijn", "photo_license": "Shutterstock", "photo_license_hyperlink": "https://www.shutterstock.com/terms", "source_info": "", "source_info_hyperlink": "https://www.shutterstock.com/image-photo/advanced-dutch-greenhouse-colorful-chrysanthemums-ready-100423213", "keywords": [] }, "elements": [ { "id": 545490, "url": "https://api.groenkennisnet.nl/web/searchretrieve/v1/json", "type": "search_retrieve_query", "title": "Nieuwsberichten van Groen Kennisnet", "query": "{\r\n"search": {\r\n"types": ["wmammodularcontent_gkn_news"],\r\n"from": 1,\r\n"to": 3,\r\n"wmamodularcontent0gkn_news0related_dossier_raw": "mediaitem-2112",\r\n"sortBy": "publicationDate",\r\n"sortOrder": "desc"\r\n}\r\n}", "frontendPresentation": "default", "useSSL": "true" } ] }, { "area": "dedefinitievanled", "title": "De definitie van LED", "contentarea_template": { "id": "contenttemplate_dossier", "name": "contenttemplate_dossier"},"background": true,"contentarea_leadtext": "Een LED (afkorting van light emitting diode) is een halfgeleider die licht uitzendt als er elektrische stroom doorheen wordt gestuurd. De eerste beschrijving ervan stamt uit 1927 en was van de Russische wetenschapper Oleg Losev. Maar het duurde nog tot 1962 voordat de Amerikaanse natuurkundige Nick Holonyak de eerste werkende LED ontwikkelde. \r\n","image": { "source": "https://api.groenkennisnet.nl/upload_mm/8/2/b/3914_fullimage_flowers-108810_1280.jpg", "width": 1280, "height": 853, "focuspoint-x": -1, "focuspoint-y": -1, "alternative_text": "Tulpen - Websi via Pixabay", "photographer": "Websi", "photographer_hyperlink": "https://pixabay.com/nl/users/websi-19306/", "photo_license": "Pixabay licence", "photo_license_hyperlink": "https://pixabay.com/nl/service/license-summary/", "source_info": "Pixabay", "source_info_hyperlink": "https://pixabay.com/nl/photos/bloemen-tulpen-gebied-108810/", "keywords": [ "tulp", "tulpen", "bloem", "bloemen", "paars", "mooi" ] }, "elements": [ { "type": "text", "html": "