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Modern exterior lighting must balance performance, safety and environmental responsibility. Issues such as glare, intrusive light, wasted energy and poor optical control are increasingly under scrutiny across rail, urban and public infrastructure environments. As a result, Zeroglis® was created to address these challenges head on.

The name reflects its core purpose: minimising glare, light spill, intrusive light and sky glow through precise, responsible luminaire design.

Zeroglis® is not just a name, it’s a complete design philosophy for exposed exterior lighting. It begins with the light itself: how it is controlled, how it interacts with its environment, and how it supports the safety and comfort of end users. Consequently, this approach influences every aspect of luminaire development, from optical engineering to environmental compliance. In turn, this ensures performance and responsibility remain aligned.

Why Zeroglis® Exists: A Modern Response to Obtrusive Light

With lighting standards tightening, the demand for controlled exterior illumination continues to grow. BS EN 12464 2:2024 defines obtrusive light as unwanted spill that reduces visibility or causes distraction, a key concern in residential areas, transport hubs and safety critical sites.

Therefore, Zeroglis® was developed to meet these requirements by promoting luminaires with:
• Zero upward light
• Exceptional glare suppression
• Controlled light distribution
• Reduced environmental disruption

As a result, this ensures compliance while improving visual comfort and operational safety.

Introducing the Zeroglis® Range

The Zeroglis® family currently includes three core exterior lighting types:

TOGETHER, they form a foundation for high‑performance exterior lighting designed to minimise obtrusive light and maximise efficiency. Notably, each product reflects the core Zeroglis® philosophy.

The PPT 500 sits at the heart of this philosophy, engineered specifically for the demands of the rail sector.

PPT-500: Purpose Built Rail Lighting for Improved Safety and Visibility

Great British Railways’ Stations of the Future proposals highlighted a lack of dedicated post top lighting designed specifically for rail environments. Traditional solutions, often adapted from road lighting, created excessive glare and visual discomfort for train drivers.

The PPT 500 was designed to solve this problem. Drawing on insights from Deutsche Bahn, it focuses on key visibility metrics such as:
• TI (Threshold Increment)
• UFP (Utilisation Factor Percentage)

Consequently, it ensures safer, more comfortable visibility across platforms and rail infrastructure.

Key Technical Features with Clear Real World Benefits

1. Concealed Light Source for Glare-Free Operation

A fully concealed optical chamber removes direct LED visibility, significantly reducing glare and improving driver and passenger comfort.

2. Zero Uplight: Fully Shielded for the Night Sky

Precision engineered optics eliminate upward light, minimising sky glow and supporting compliance with environmental zone requirements defined in BS EN standards. Moreover, this helps protect nocturnal environments.

3. High Utilisation Factor Through Precise Light Distribution

Light is directed exactly where it is needed, improving safety, reducing waste and embodying the Zeroglis® principle of prioritising optical performance. Subsequently, operational efficiency increases.

Why Zeroglis® Matters

As cities evolve and rail networks modernise, demand for sustainable, high performance exterior lighting continues to increase.

Zeroglis® directly addresses these needs, combining:
• Enhanced safety
• Environmental responsibility
• Improved visual comfort
• Efficient light distribution

Ultimately, by aiming for Zero Glare, Zero Light Spill, Zero Intrusive Light and Zero Sky Glow, Zeroglis® sets a new benchmark for modern exterior lighting systems. Therefore, it provides a forward‑looking approach to responsible illumination.

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