Intral is a fully integrated lighting trunking system with extruded aluminium profile, highly efficient luminaires, pre-wired internal cables and plug-in connectors. Flexible luminaire positioning and the ability to fine-tune light output result in optimum design solutions for most Industrial projects.

There is no need to fit luminaires into the trunking on site as each section of the Intral system is delivered pre-assembled and labelled with project specific codes for a quick and easy installation. Minimal packaging ensures a low environmental impact and reduced time in waste removal.

Intral uses high quality components for long life and maximum energy efficiency. Aluminium profiles ensure rigid light-lines and produce lower internal temperatures than steel systems. This form of  thermal management  lengthens the life expectancy of wiring, drivers and other components therefore minimising failures caused by over-heating.


  • Lens or diffuser optics
  • Wide, medium and narrow (rack) distribution patterns
  • PMMA diffuser material
  • Long life 100,000 hours to L80B50
  • 4000K Ra80 LEDs


  • Quick and simple to install, typically half the time of other similar systems
  • Delivered pre-assembled and labelled, ready to install
  • High efficacy luminaires, up to 180 ll/cw
  • Robust, high quality construction with long life components
  • Allows flexibility for future use
  • Extruded aluminium trunking profile
  • 60mm wide trunking sections, supplied in lengths to suit project
  • Pre-wired 7 core internal conductors with plug and sockets as standard
  • 10 or 13 core versions available
  • Optional trunking profile with additional cable channels on top for other services
  • Integrated standalone lighting controls available to control groups of luminaires
  • Presence and daylight sensing for maximum energy savings
  • Detection zones to cover narrow areas (racking aisles) and open areas
  • IP40 as standard when assembled
  • IP54 and IP65 options available

Design files for Relux and Dialux

Type 8000 lumen 14000 lumen 17000 lumen
Diffuser, Wide LTDH1514KWO LTDH1524KWO LTDH1534KWO
Diffuser, Medium LTDH1514KM LTDH1524KN LTDH1534KN
Diffuser, Narrow LTDH1514KN LTDH1524KN LTDH1534KN
Lens, Wide LTLH1514KW LTLH1524KW -
Lens, Medium LTLH1514KM LTLH1524KM -
Lens, Narrow LTLH1514KN LTLH1524KN -

Intral is a project specific system, the codes shown are to assist with lighting design. Please contact Whitecroft for project design and pricing support.

Dimensions Diagram 1
per 1.53 1530 60 61.3 5.9 6.9
Power supply 150 60 55 0.5 -

Intral is a project based solution, supplied fully assembled in an optimum length of 4.59m. Weights shown above are the maximum for the complete system, per 1.53m. Exact details may change subject to project requirements.

Photometic Performance

Photometic Performance Diagram - Intral Diffuser Luminaire - Narrow
Intral Diffuser Luminaire - Narrow
Photometic Performance Diagram - Intral Diffuser Luminaire - Medium
Intral Diffuser Luminaire - Medium
Photometic Performance Diagram - Intral Diffuser Luminaire - Wide
Intral Diffuser Luminaire - Wide
Photometic Performance Diagram - Intral Lens Luminaire - Narrow
Intral Lens Luminaire - Narrow
Photometic Performance Diagram - Intral Lens Luminaire - Medium
Intral Lens Luminaire - Medium
Photometic Performance Diagram - Intral Lens Luminaire - Wide
Intral Lens Luminaire - Wide

Performance Guide

Performance Guide Diagram 1
  • Detection Zone: Open Area

Performance Guide Diagram 4
  • Detection Zone: Narrow Area

LED Performance

Colour Temp RA (CRI) Life expectancy Colour consistency
4000K Ra>80 L80(100,000hrs) MacAdam 3 SDCM

Fully integrated lighting trunking system with extruded aluminium profile, highly efficient luminaires, pre-wired 7 to 13 core cables and plug-in connectors. Robust, high quality components to ensure a long life and maximum energy efficiency. Factory assembled system delivered ready to install for a quick and easy installation – as Whitecroft Lighting INTRAL.

Product Downloads

Select all
  • PDF Intral Datasheet
  • PDF Brochure
  • PDF Installation leaflet
  • ZIP ies - Intral diffuser
  • ZIP ies - Intral Lens
  • ZIP Dialux - Intral Diffuser
  • ZIP Dialux - Intral Lens
  • ZIP Relux - Intral Diffuser and Lens
  • ZIP LDT - Intral Diffuser
  • ZIP LDT - Intral Lens

At Whitecroft, we have developed the Whitecroft Lighting Academy, a structured learning programme that will allow us to develop our future leaders, and ensure all of our staff have access to the best professional development opportunities available in our industry.

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At Whitecroft, our BIM engineers are not only adept at using Autodesk Revit; they are also fully trained lighting designers. We believe this is essential. When you use our teams on your project, you can rest assured the whole lighting solution is being designed, assessed and managed by people who know the technology inside out and have a full understanding of your requirements.

- We can populate your BIM model with a full lighting design.

- All our BIM families are created in-house, so if bespoke models are required, we can deliver them.

- We use Relux to create design validation data that confirms your project’s compliance and supports your BIM model.

- Once the model is complete, we work with you to interrogate every element including quantity schedules, costs, energy validation, COBie data and delivery schedules.

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Whitecroft have become successful in the lighting market, with focus on various sector specialisms. We now have extended our skills by offering a fully managed service which supplies much more than just the luminaires.

Project Management skills have been developed to save time on a project by planning it out and considering all relevant factors which may affect its outcome.

From design to specification, through to product selection, commissioning and after-sales support, we can help our customers meet the cost challenges of the commercial environment.

Our Project Management services encourage a smooth transition throughout your lighting procurement, manufacture, delivery and installation, by providing advice on the best techniques to employ.


Whitecroft Lighting continuously strives to offer customers the best service in the industry. This covers all aspects of our service from lighting design and quotations, to ensuring on-time deliveries and providing dedicated project management.

Whitecroft Lighting operates in a sustainable way by creating lighting solutions best adapted to customer requirements, with the least possible impact on the environment including consumption of natural resources. Whitecroft Lighting contributes to and takes responsibility for the furtherment of sustainability, which it also requires of all suppliers in it’s chain.

Through our environmental management system we are continually reducing our use of natural resources, whilst optimising recycled materials, avoiding waste generation and increasing recycling. As a responsible manufacturer we carry our company values and policies into our supply chain so that our customers can have confidence in the fact that all our lighting solutions are manufactured using only environmentally safe materials and processes.