Twin 5ft 50W Emergency LED Batten 4000K - White

The 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.

Designed 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.

The 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.

The 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.

Product Specification Sheet

What's the difference between maintained and non-maintained emergency modes?

In 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.

How long does the emergency battery last?

The 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.

Can this replace a traditional twin-T8 fluorescent batten?

Yes. 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.

Is the batten suitable for outdoor use?

No. 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.