15W CCT Emergency Microwave Non-Dimmable Bulkhead Gear Tray

This is the working half of a bulkhead. A circular LED gear tray carries the diodes, the driver and the control electronics on one white board, ready to drop into a housing in place of a failed fluorescent gear set or a tired LED plate. The pack states 15W and lists four functions across the front: CCT selection, emergency, a microwave sensor and a corridor mode. Colour temperature is chosen on the board rather than at the wall switch, with 3000K, 4000K and 6000K printed on the pack, so one part number covers a warm domestic tone, a neutral commercial white and a bright daylight setting. Output is 1725lm spread across 120 degrees.

Trays like this are bought for one of two reasons: a repair, or a change of specification in a building already fitted out with bulkheads. Communal stairwells, corridors, garages, plant rooms, cellars and store cupboards are the usual destinations. A microwave sensor suits routes people walk through rather than sit in, because it responds to movement rather than body heat and will work from behind a diffuser. Measure first. The manufacturer gives no diameter and no fixing pattern, and a tray only earns its place if it matches the housing you already own. We also stock bulkhead bodies, including tamper proof ones, where the old housing is beyond saving.

Control is deliberately simple. The colour setting is made once at installation and the sensor then handles switching, so there is no dimmer to specify and none should be wired in: the manufacturer records this tray as non-dimmable. It runs on a 220-240V mains supply and carries an IP20 rating, which makes it an indoor part for a dry, enclosed housing. The pack states a 35,000 hour product life. One tray is supplied per order, with a minimum order of one.

Will this tray fit the bulkhead I already have?

Measure the internal diameter of your housing and the fixing centres before ordering. The manufacturer does not publish a board diameter for this tray, so a physical check against the old gear plate is the only safe way to confirm the swap.

How do I choose between 3000K, 4000K and 6000K?

The setting is made on the board itself rather than at the wall switch, so choose before the tray goes in. 3000K reads warm and domestic, 4000K is a neutral working white and 6000K is a cold, bright daylight tone.

Can I run it from a dimmer switch?

No. The manufacturer records this tray as non-dimmable, so it needs a plain switched supply. Wiring it into a dimming circuit risks flicker, buzzing and early failure of the driver built into the board.

What does the microwave sensor actually detect?

Microwave sensors send out a low power radio signal and watch for changes in what bounces back, so they pick up movement rather than body heat and can sense it through a plastic diffuser.

How long does the emergency function run for?

The pack lists an emergency function, but the manufacturer does not print a duration or name the battery it uses, so treat the run time as unconfirmed where a specific standard has to be met.

Is there an incandescent or fluorescent equivalent figure?

No equivalent wattage is printed on the pack or given in the specification, so judge it on the real figures instead: 1725lm at a 120 degree spread, running from a 220-240V mains supply.