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

The Knightsbridge 4ft LED batten combines adjustable wattage (18W or 32W), adjustable colour temperature (3000K, 4000K or 5700K), microwave presence detection and self-test emergency function in a single 1225mm pressed steel and polycarbonate housing. The batten delivers 2600lm at 18W or 4490lm at 32W when set to 4000K, with both wattage and CCT adjusted via switches on the gear tray before installation.

Designed as a direct replacement for conventional 4ft fluorescent fittings in commercial, industrial and public sector environments, the batten fits standard 600mm fixing centres and BESA boxes. The microwave presence sensor detects movement within its coverage zone and automatically switches the batten on or off depending on occupancy, with adjustable sensitivity and hold-time settings. The self-test emergency module runs automatic function and duration tests without manual intervention, meeting BS 5266 and BS EN 50172 compliance requirements for emergency lighting installations.

The hinged gear tray opens for quick access to the wiring terminals, which use push-fit loop-in/loop-out connectors for fast multi-batten runs without needing terminal blocks. Rear and end conduit fixings allow cable entry from multiple points depending on site requirements. The opal polycarbonate diffuser spreads light evenly across the 145-degree beam angle, reducing glare and eliminating visible LED hotspots. The batten carries an IP20 rating for dry indoor use and a Class I earth connection.

The L70B50 rating of 60,000 hours indicates the point at which 50% of tested units still deliver at least 70% of their initial light output — approximately 7 years of continuous operation or 20+ years at typical commercial occupancy patterns. The 5-year warranty covers the LED driver and housing but excludes the emergency battery, which has a shorter service life and requires periodic replacement as part of routine maintenance.

Product Specification Sheet

Product Manual

How is the wattage and colour temperature adjusted?

Both wattage (18W or 32W) and CCT (3000K, 4000K or 5700K) are adjusted via switches on the hinged gear tray. These settings must be configured during installation before the batten is powered up. Changes cannot be made remotely or via external controls once the unit is live.

How does the microwave sensor work?

The microwave presence sensor detects movement within its coverage zone and automatically switches the batten on when occupancy is detected. The sensitivity and hold-time (how long the light stays on after last detecting movement) are adjustable via controls on the gear tray. This is different from a PIR sensor — microwave detection works through non-metallic barriers and has a wider detection pattern.

What does self-test emergency mean?

The self-test emergency module automatically runs function tests (short bursts to confirm the battery and LED work) and duration tests (full 3-hour discharge cycles) at programmed intervals. The results are stored in the module's memory and can be checked during routine inspections. This removes the need for manual monthly and annual testing required by BS 5266.

Can this replace a traditional fluorescent batten?

Yes. The batten is designed as a direct retrofit for 4ft fluorescent battens. It fits standard 600mm fixing centres and BESA boxes, and the rear/end conduit entry points match typical fluorescent batten wiring arrangements. The push-fit loop-in/loop-out terminals allow multi-batten runs to be wired in the same way as the fluorescent units they replace.