Knightsbridge 4ft 18/32W CCT Adjustable Self-Test Emergency LED Batten - White

The Knightsbridge BATSCWST4 is a 4ft LED emergency batten with switchable wattage (18W or 32W) and three selectable colour temperatures (3000K warm white, 4000K neutral white, 5700K daylight). The fitting contains an integrated self-test emergency function that runs automatic tests on battery charge and lamp operation, with maintained, non-maintained and switched emergency modes available. At 32W and 4000K the batten outputs 4490lm through an opal polycarbonate diffuser.

Designed as a direct replacement for 4ft twin-lamp fluorescent battens in commercial, educational, healthcare and industrial settings, the fitting mounts on standard 600mm fixing centres or BESA boxes and includes rear and end-entry conduit points for cable management. The hinged gear tray opens for access to push-fit loop-in-loop-out terminals, allowing multiple battens to be daisy-chained on a single circuit without additional junction boxes. The Class I construction requires an earth connection.

The pressed steel body is powder-coated white and measures 1225mm x 61mm x 71mm projection. The CCT switch on the gear tray allows installers to set the light colour after installation without changing the lamp, giving flexibility for spaces where colour temperature needs vary. The 18W mode suits corridors and circulation areas where lower light levels are acceptable, while the 32W mode provides task-level illumination for offices and workshop environments. The L70B50 rating of 60,000 hours suggests over 6 years of continuous operation before the LED output drops to 70% of initial lumens.

The self-test emergency function runs a short functional test monthly and a full 3-hour duration test annually, with status indicated by an LED on the fitting. In emergency mode the batten provides 320lm output from the internal battery pack, sufficient for escape route lighting under BS 5266 and BS EN 1838 standards. The 5-year warranty covers the LED and driver components but excludes the emergency battery.

Product Specification Sheet

Product Manual

What is self-test emergency lighting?

The self-test function automatically checks the battery charge and lamp operation on a scheduled basis without manual intervention. The fitting runs a short functional test once per month and a full 3-hour duration test once per year, with results indicated by an LED status light on the fitting. This removes the need for manual testing logs in many commercial installations.

Can the colour temperature be changed after installation?

Yes. A CCT switch on the gear tray allows the installer to select 3000K warm white, 4000K neutral white or 5700K daylight. The switch is accessible by opening the hinged gear tray and does not require changing any LED components.

What's the difference between 18W and 32W modes?

The wattage is selectable via a switch on the gear tray. At 18W the batten outputs 2600lm at 4000K, suitable for corridors and circulation areas. At 32W it outputs 4490lm at 4000K, providing task-level lighting for offices and workshops. Switching wattage changes both the light output and the energy consumption.

Does it fit standard fluorescent batten mountings?

Yes. The batten mounts on 600mm fixing centres and is BESA box compatible, making it a direct replacement for twin-lamp 4ft fluorescent battens. Rear and end-entry conduit points allow cables to be run in armoured or plastic conduit where required.