{"product_id":"twin-5ft-50w-emergency-led-batten-4000k-white","title":"Twin 5ft 50W Emergency LED Batten 4000K - White","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Knightsbridge T8BLED25EM1 is a twin-tube 5ft LED batten with integrated emergency lighting, delivering 5250 lumens at 4000K cool white through an opal polycarbonate diffuser. The twin-LED configuration replaces traditional twin-T8 fluorescent battens in commercial, industrial and public building applications where emergency lighting is required by regulation. The unit operates in maintained, non-maintained or switched emergency modes with a 3-hour runtime from the internal battery.\u003c\/p\u003e\n\u003cp\u003eDesigned for ceiling or wall mounting in corridors, stairwells, warehouses, workshops, car parks, commercial kitchens and retail back-of-house areas, the batten provides both task lighting during normal operation and code-compliant emergency lighting during mains failure. The 1525mm length covers approximately 8-10m² of floor area depending on ceiling height and reflectance. The pressed steel body and polycarbonate diffuser carry an IP20 rating, suitable for dry indoor environments.\u003c\/p\u003e\n\u003cp\u003eThe integrated LED array delivers 102 lumens per watt at 50W, with an L70B50 lifespan of 50,000 hours — approximately 17 years under typical commercial operating patterns. The constant-current driver maintains stable output across the 230V 50Hz mains supply. The emergency battery is rated for 3-hour maintained or non-maintained operation at 280 lumens, meeting UK Building Regulations for emergency escape lighting. The 120° beam angle provides wide-area coverage without requiring multiple fittings in standard 2.4-2.7m ceiling heights.\u003c\/p\u003e\n\u003cp\u003eThe white powder-coated finish integrates cleanly into commercial ceilings and pairs with standard white or off-white ceiling tiles. The batten measures 1525mm long × 95mm wide × 85mm projection, fitting into ceiling grids designed for traditional 5ft fluorescent battens. The unit carries a 5-year warranty on the LED and driver (battery excluded), and is rated Energy Class D under post-2021 single lighting regulation standards.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e1525 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e95 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProjection\u003c\/td\u003e\n\u003ctd\u003e85 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003ePressed steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction 2\u003c\/td\u003e\n\u003ctd\u003e\u0026amp; polycarbonate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClass\u003c\/td\u003e\n\u003ctd\u003eI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP Rating\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Voltage\u003c\/td\u003e\n\u003ctd\u003e230V 50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiffuser\u003c\/td\u003e\n\u003ctd\u003eOpal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmergency\u003c\/td\u003e\n\u003ctd\u003eMaintained \/ Non-maintained \/ Switched\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLamp Technology\u003c\/td\u003e\n\u003ctd\u003eLED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLamp Included\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimmable\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL70B50\u003c\/td\u003e\n\u003ctd\u003e50000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnergy Rating (Class) post 2021 SLR\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBeam Angle\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCCT\u003c\/td\u003e\n\u003ctd\u003e4000 K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Colour\u003c\/td\u003e\n\u003ctd\u003eCool White\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLumens\u003c\/td\u003e\n\u003ctd\u003e5250 lm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLumens (Light Source only)\u003c\/td\u003e\n\u003ctd\u003e6535 lm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLumens (Em. mode)\u003c\/td\u003e\n\u003ctd\u003e280 lm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWattage\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficacy\u003c\/td\u003e\n\u003ctd\u003e102 lm\/W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCRI\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDriver Type\u003c\/td\u003e\n\u003ctd\u003eConstant Current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty Information\u003c\/td\u003e\n\u003ctd\u003e(excluding battery)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/products_3511330_datasheet.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between maintained and non-maintained emergency modes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn maintained mode, the emergency LEDs operate continuously whenever the mains supply is live, switching to battery power during outages. In non-maintained mode, the emergency LEDs only activate when mains power fails. Switched mode allows the fitting to operate as a standard light when manually switched on, with emergency function activating during power failure regardless of switch position.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does the emergency battery last?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe internal battery provides 3 hours of emergency illumination at 280 lumens during mains failure, meeting UK Building Regulations Part B requirements for emergency escape lighting. The battery requires periodic replacement — typical lifespan is 3-4 years depending on discharge cycles and ambient temperature.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this replace a traditional twin-T8 fluorescent batten?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 1525mm length and 95mm width match standard 5ft twin-T8 battens. The mounting centres are compatible with existing ceiling grid and surface-mount positions designed for fluorescent fittings. This LED version eliminates the need for tube replacement and reduces energy consumption by approximately 60% compared to equivalent twin-58W fluorescent output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the batten suitable for outdoor use?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The IP20 rating means the batten is designed for dry indoor environments only. For outdoor or wet-area applications, you would need a fitting with IP65 or higher rating.\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":45293987823883,"sku":"T8BLED25EM1","price":111.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/211214_1f26a329-675a-443e-b6f5-b05fd6385ea3.jpg?v=1714667146","url":"https:\/\/niori.co.uk\/products\/twin-5ft-50w-emergency-led-batten-4000k-white","provider":"Niori","version":"1.0","type":"link"}