Knightsbridge 5ft 22/41W CCT Adjustable Self-Test Emergency Batten - White

The Knightsbridge 5ft emergency batten is a single-tube LED fitting with adjustable wattage (22W or 41W) and adjustable colour temperature (3000K, 4000K or 5700K), giving output ranging from 2,970lm to 6,040lm depending on the selected combination. The self-test emergency function runs automatic tests of the battery and lamp duration without manual intervention, complying with BS 5266 requirements for emergency lighting in commercial and public buildings.

Designed as a direct replacement for fluorescent tube battens in offices, corridors, stairwells, storage areas and plant rooms, the fitting measures 1525mm long and fits standard 600mm fixing centres or BESA boxes. The hinged gear tray and push-fit loop-in/loop-out terminals allow wiring and connection without removing the fitting from the ceiling, speeding up installation and reducing labour time on multi-unit projects. Rear and end conduit fixing points accommodate both surface and trunking installations.

The pressed steel body and opal polycarbonate diffuser give IP20 protection suitable for dry indoor environments. The 145° beam angle provides wide light distribution across ceilings and work surfaces without creating dark zones between fittings. At 41W and 4000K the batten delivers 6,040lm at 160.58lm/W efficacy, reducing running costs compared to older fluorescent equivalents. The LED has an L70B50 rating of 60,000 hours (approximately 13.7 years at 12 hours per day), though the emergency battery carries a separate warranty exclusion due to its chemical lifespan.

The emergency mode provides 360lm maintained, non-maintained or switched operation depending on wiring configuration. The self-test function automatically checks battery charge and discharge cycles monthly and annually, with visual indicators on the fitting showing pass/fail status. This removes the need for manual testing logs in smaller installations, though record-keeping may still be required under building management protocols.

Product Specification Sheet

Product Manual

How is the wattage and colour temperature adjusted?

Both settings are adjusted via switches inside the gear tray before final installation. The wattage toggle selects between 22W and 41W output, and the CCT switch selects 3000K (warm white), 4000K (neutral white) or 5700K (daylight). Once set and the fitting is installed, these settings remain fixed unless the fitting is removed and reopened.

What does the self-test emergency function do?

The self-test circuit automatically performs monthly short-duration tests and annual full-duration tests of the emergency battery and lamp operation, as required by BS 5266. Visual indicators on the fitting show pass or fail status after each test, removing the need for manual testing in smaller installations.

Can this replace a fluorescent tube batten directly?

Yes. The fitting is designed to mount on standard 600mm fixing centres and BESA boxes used by most fluorescent battens. The rear and end conduit fixing points match typical fluorescent mounting patterns, and the push-fit loop-in/loop-out terminals accept the same wiring as the old fitting.

What emergency modes does it support?

The fitting can be wired for maintained (always on), non-maintained (on only during mains failure) or switched maintained operation. The wiring configuration determines which mode is active. In emergency mode the fitting provides 360lm output for the rated emergency duration.