Lighting retrofits are already a powerful tool for cutting carbon, reducing waste, and slashing operational costs. But to truly unlock their full potential, it’s time to think beyond the light fitting itself.
By integrating smart controls — including PIR sensors, daylight sensors, and centralised control systems — businesses can dramatically increase the ROI of their retrofit projects. The result? Lower bills, fewer emissions, and lighting that adapts to the way spaces are actually used.
Why Add Sensors to a Retrofit?
When upgrading legacy lighting to LEDs, many organisations see energy savings of 50–70% immediately. But that’s just the beginning. Add occupancy and daylight controls, and energy use can drop by up to 90%, especially in spaces with variable usage patterns like offices, corridors, washrooms, and meeting rooms.
That’s because smart controls:
• Reduce wasted energy by switching off or dimming lights when areas are unoccupied
• Respond to natural light by adjusting brightness levels automatically
• Extend lamp life by reducing unnecessary run-time
• Support compliance with energy codes and ESG goals
Smart sensors make retrofit lighting systems more intelligent, more flexible, and more future-proof.
Common Smart Controls Used in Retrofit Projects
1. PIR (Passive Infrared) Sensors
These detect body heat and motion, switching lights on when a space is occupied and off when it’s empty. Ideal for areas with intermittent use:
• Toilets
• Corridors
• Meeting rooms
• Storage areas
2. Daylight Harvesting Sensors
These measure available natural light and dim artificial lighting to maintain the required lux levels. They’re perfect for:
• Perimeter zones near windows
• Atriums
• Open-plan offices
3. Smart Control Systems
These go beyond individual sensors, enabling programmable lighting zones, remote monitoring, and energy reporting. Popular in large commercial spaces, smart systems can be integrated into wider BMS (building management systems) or run independently.
The ROI of Smart-Controlled Retrofitting
While the upfront cost of adding controls is slightly higher, the long-term benefits quickly outweigh the investment.
Consider this:
• Retrofitting with LEDs alone might deliver a 5-year ROI
• Add PIR and daylight sensors, and that ROI can shrink to 2–3 years
• In some cases, the entire project pays for itself through energy savings in under 24 months
Plus, with growing pressure to meet Net Zero targets, smart retrofits are a future-facing investment in both environmental and financial sustainability.
Retrofitting Without the Waste
At Revitalite, we specialise in LED retrofits that preserve existing fittings — stripping out outdated gear and upgrading with efficient, high-performance technology. Our approach keeps more materials in use, keeps costs down, and avoids waste heading to landfill.
And when we combine that with smart controls?
We’re helping businesses get greener, faster — without compromising on lighting quality or design.
Looking to retrofit your lighting system with smart controls?
Get in touch with our team — we’ll help you assess your site, choose the right control strategy, and maximise your long-term savings.
