{"product_id":"3-5w-led-emergency-downlight-5500k-black-maintained-or-non-maintained","title":"3.5W LED Emergency Downlight 5500K - Black (Maintained or Non-Maintained)","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Knightsbridge EMPOWER4BK is a 3.5W LED emergency downlight with an integrated LiFePO4 (lithium iron phosphate) battery providing a minimum 3-hour backup illumination at 140 lumens. The fitting operates in either maintained mode (permanently illuminated) or non-maintained mode (illuminates only on mains failure), selectable during installation. A separate green LED charge indicator shows battery status without opening the fitting.\u003c\/p\u003e\n\u003cp\u003eDesigned for commercial corridors, escape routes, stairwells and residential fire-safety compliance, the downlight recesses into ceilings with a minimum 80mm void depth behind a 45mm cut-out. The 60mm black polycarbonate bezel sits flush with the ceiling plane once installed. The fitting ships with a pre-wired battery pack and a corridor lens accessory in the box, giving a narrow beam pattern suited to long hallways where wider spread would waste light.\u003c\/p\u003e\n\u003cp\u003eThe 5500K daylight colour temperature provides high visual clarity for navigation during power outages, contrasting with the warmer 2700K-3000K ambient lighting typically used in residential and hospitality spaces. The IP20 rating limits the fitting to dry indoor locations. The polycarbonate construction and Class II double-insulated design mean no earth connection is required, simplifying installation on older wiring where earth availability may be inconsistent.\u003c\/p\u003e\n\u003cp\u003eThe LiFePO4 battery chemistry offers longer cycle life and better thermal stability than standard lithium-ion cells, with the L70B50 rating of 30,000 hours indicating the fitting retains 70% of initial light output after 30,000 hours of operation. A manual emergency test button on the driver allows periodic compliance testing without cutting mains power to the circuit.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e183 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecessed Depth\u003c\/td\u003e\n\u003ctd\u003e32 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Void\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCut-out Diameter\u003c\/td\u003e\n\u003ctd\u003e45 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003ePolycarbonate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClass\u003c\/td\u003e\n\u003ctd\u003eII\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\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e0.35 m\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\u003e30000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBeam Angle\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCCT\u003c\/td\u003e\n\u003ctd\u003e5500 K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Colour\u003c\/td\u003e\n\u003ctd\u003eDaylight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLumens\u003c\/td\u003e\n\u003ctd\u003e140 lm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLumens (Em. mode)\u003c\/td\u003e\n\u003ctd\u003e140 lm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWattage\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficacy\u003c\/td\u003e\n\u003ctd\u003e40 lm\/W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCRI\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;70\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\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_4383090_datasheet.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/manual_1824068.pdf\" target=\"_self\"\u003eProduct Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between maintained and non-maintained mode?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn maintained mode the downlight remains permanently illuminated when mains power is present, switching to battery backup during a power cut. In non-maintained mode the downlight only illuminates when mains power fails. The mode is selected during installation via a switch on the driver.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does the battery last on a single charge?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe LiFePO4 battery provides a minimum 3 hours of emergency illumination at 140 lumens once fully charged. The green LED charge indicator shows when the battery has returned to full charge after a discharge event.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat ceiling void depth is required?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA minimum 80mm void depth is needed above the ceiling to accommodate the driver unit and battery pack. The downlight itself recesses 32mm into the ceiling through a 45mm diameter cut-out.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used in bathrooms?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The IP20 rating limits the fitting to dry indoor locations only. Bathrooms, kitchens and other moisture-prone areas require a minimum IP44 or IP65 rating depending on zone.\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":45293603356939,"sku":"EMPOWER4BK","price":33.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/1751004_444c67ed-c527-4a3c-8ff4-ff67335ac10f.jpg?v=1714661062","url":"https:\/\/niori.co.uk\/products\/3-5w-led-emergency-downlight-5500k-black-maintained-or-non-maintained","provider":"Niori","version":"1.0","type":"link"}