The experts at ROBUS explain what ‘corridor function’ is, how it works and why it can be used to slash your customers’ energy use.
Why are these lights always on?!” It’s a familiar complaint – usually from the person footing the energy bill. They’ll mutter it under their breath while passive-aggressively marching around switching lights off, hoping someone takes the hint. But in some spaces, lights can’t just be off. Whether it’s for safety, security, or peace of mind, a simple on/off setup just doesn’t cut it. That’s exactly where the nifty corridor function comes into its own.
What is ‘corridor function’?
Corridor function – sometimes referred to as three-step dimming – is a feature that allows light sources to automatically adjust light levels based on occupancy. It works by combining a sensor with a built-in dimming function in the light source.
When movement is detected, the light switches to full brightness. After a set period of no activity, it dims to a lower level (e.g. 10–50%) rather than turning off completely, maintaining safety while saving energy. If there’s still no movement after a longer period, the light can either remain dimmed or switch off completely.
Microwave sensors for corridor function
Microwave sensors are ideal for corridor function, offering wide coverage and high sensitivity. They work by emitting high-frequency waves and detecting changes in the reflected signal to sense motion – even through glass, doors, or around corners. This makes them perfect for longer corridors, enclosed areas, or spaces with obstructions.
For example, ROBUS’s HARBOUR EXPRESS LED corrosion-proof fitting has a plug-in microwave sensor accessory featuring three-step dimming and on/off functionality to deliver great energy savings.
Energy savings, better safety and longer-lasting
So, what are the benefits? Firstly, corridor function cuts energy use by dimming or switching off lights when no one’s around, The experts at ROBUS explain what ‘corridor function’ is, how it works and why it can be used to slash your customers’ energy use. saving up to 60% compared to always-on lighting. But it doesn’t leave people in the dark! Low-level background lighting stays on, keeping spaces like stairwells and walkways safe and comfortable.
With the corridor function, the light sources aren’t blasting full power all the time, therefore they last longer which means fewer callouts and replacements.
Working on a project with compliance boxes to tick? Corridor function helps meet building safety standards, especially for communal areas where lighting can’t just go off.
Where should corridor function be applied?
There are many use cases for the corridor function in residential, commercial, and industrial settings. Here are just a few examples to give you an idea:
Stairwells in apartment blocks and landlord areas
Lighting stays dim when empty but brightens instantly when someone enters, keeping residents safe without wasting energy.
Safety in care homes
Supports responsive and safe care. Ideal for night-time checks, giving carers just enough light without disturbing sleeping residents, while also reducing the risk of trips and falls,
School corridors after hours
Provides low-level lighting for cleaners and caretakers, then switches off completely overnight to save energy.
Underground car parks
Maintains a safe, well-lit feel with standby dimming, while cutting power use when no vehicles or people are present.
How to install a corridor function
Corridor function is either built into the light source already or, where compatible, can be added as an accessory.
For example, with ROBUS’s new SPEEDBEAM EXPRESS LED batten range, the modular design allows you to simply plug-in the microwave sensor accessory, which features both on/off switch and corridor function.
Settings like brightness levels, time delays, and fade times are usually adjustable via DIP switches or a dial rotary. SPEEDBEAM EXPRESS has gone with a dip switch design for reliable, tamper-resistant control that’s easy to replicate across multiple light sources.
Once set, the switches stay fixed, unlike dials, which can be accidentally knocked or misaligned during installation or maintenance. DIP switches also allow for clear, consistent configuration, making them ideal for large projects where uniformity is key.
Take control of corridor lighting
Corridor function is a simple yet powerful way to boost energy efficiency, enhance safety, and extend the life of light sources without overcomplicating the installation. Whether you’re working on an apartment block, car park, or school hallway, it’s a feature that ticks all the boxes.
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