40W IP20 4ft LED Emergency Twin Batten - Cool White 4000K

A 4ft batten is the workhorse of the lighting world, and this one packs 40W of LED into a 1200mm white body with an opal diffuser running its full length. It gives 4,800 lumens at 4,000K, a cool white that reads as clean and neutral rather than blue or yellow, and it spreads that light over a 120 degree beam so one run covers a wide floor area. The LEDs are integrated, so there is no tube to buy separately and nothing to swap out when a lamp reaches the end of its life. It also carries an emergency module, which keeps a reduced light level running if the mains supply fails.

Battens like this earn their place in garages, workshops, lofts, utility rooms, stockrooms, corridors and small commercial units, anywhere the priority is seeing clearly rather than setting a mood. At IP20 it is for dry indoor use only, so keep it out of damp or unheated spaces where condensation forms. It surface mounts to a ceiling or a wall, and the screwless hinged body opens without a screwdriver, which helps when you are working overhead. The emergency version tends to be chosen for corridors, stairwells and store rooms where a light needs to stay on if the power goes.

This batten is not dimmable, so wire it to a plain switch and check that any dimmer module on the circuit is taken out first. The manufacturer does not state how long the emergency output runs for, so if a scheme calls for a specific duration, ask us before ordering. It is sold as one fitting with a minimum order of one, so you can buy a single unit for a small job or as many as a run needs. Alongside it we stock battens from the same maker in 5ft and 6ft, in single and twin, and IP65 non-corrosive versions for tougher spaces.

Will this replace an old 4ft fluorescent batten?

It replaces the whole fitting rather than just the tube, because the LEDs are built in. Check the existing fixing points and where the supply cable enters before you take the old one down.

What fluorescent wattage does 40W of LED compare with?

The manufacturer does not state an equivalence, so we will not quote one. Compare on the 4,800 lumen figure instead, which is the honest measure of how much light you get.

Can I run it on a dimmer?

No. It is non-dimmable, so it needs a plain on and off switch. Wiring it through a dimmer module risks flicker, buzzing and early failure of the driver.

What does the emergency function actually do?

If the mains supply fails, an internal battery keeps the fitting producing a reduced light level so a space stays usable. The manufacturer does not print the duration, so ask if you need a figure.

Is 4,000K the right colour for a workshop or garage?

Yes for most working spaces. Cool white at 4,000K keeps colours looking true and feels alert, which suits benches, tool walls and anywhere you are reading small print.

How many will I need for a garage?

As a rough guide, one 4,800 lumen batten covers a single garage bay. For a double garage or a long workshop, plan two or three in a line rather than one central fitting.