Overview
A leading property management company is responsible for Aylesbury Shopping Park, a busy retail destination in Aylesbury owned by Aviva Investors. Reliable, energy-efficient car park lighting is essential to support safety, customer experience and ESG targets.
The existing 170W traditional street lights were ageing and unreliable. Frequent failures, circuit tripping and poor lux levels created safety concerns and rising maintenance costs. Rather than a simple LED swap, the client sought a smart lighting solution to reduce energy consumption, cut carbon and improve long-term asset performance.
Kellwood Lighting was appointed to deliver a tailored, future-ready upgrade.
The Challenge
The legacy lighting system had become increasingly problematic, causing:
- Dark spots and inconsistent illumination
- Electrical faults and downtime
- Escalating maintenance costs
- High energy usage
Mechanical timers and contactors required regular intervention, adding complexity and cost.
The site includes two areas with different operational needs:
- A 24-hour public car park
- A service yard locked overnight
Each required different lux levels at different times. A basic LED replacement would improve efficiency but would not provide the adaptive control, remote monitoring or long-term savings the client required.
The work
Kellwood Lighting installed Arrol 5 Series 60W high-efficacy LED streetlights with Wireless Pro lighting controls.
The 170W fittings were replaced with 60W LED luminaires. During commissioning, outputs were reviewed with the client and throttled to achieve optimal lux levels without over-lighting.
Each fitting was equipped with wireless control nodes and calibrated photocells, enabling:
- Seasonal daylight dimming
- Scheduled operation
- Remote access via an online dashboard
- Proactive driver monitoring
Service area lights were wirelessly grouped and programmed to dim between 23:00 and 05:00, maintaining security lighting while reducing unnecessary energy use.
To accommodate varied column types, Kellwood supplied six post-top bracket variations, including customised options. Ageing mechanical switches were bypassed to improve reliability.
The results
The combination of energy-efficient LED lighting and wireless controls delivered significant, measurable benefits.
| Project Element/(Additional) Annual Savings: | Energy | Cost | Co2 |
|---|---|---|---|
| LED replacement 170W to 60W: | 64% | £11,351 | 7.5 Tonnes |
| (Throttling from 100% to 80%): | 20% | £1,318 | 0.8 Tonnes |
| (Scheduled service area dimming): | 10% | £503 | 0.3 Tonnes |
- £65,462 total savings
- 43 tonnes of carbon reduced
The upgrade also improved lux levels, enhanced safety and reduced reactive maintenance.
Technical Services Manager, states:
>62% forecast energy saving
≥57% estimated energy saving
