Chalis Light Guide

Available from 23W-47W

The Chalis Light Guide post top range goes against the convention of using LEDs behind lenses. The conventional light engine has been replaced by a new low glare, comfortable ‘Light Guide’ that has been specifically designed to enhance user experience of the lit application. Paired with a sympathetic colour temperature of 3000K, the Chalis Light Guide is the perfect solution to high pedestrian traffic areas such as town centre market squares and high streets. Full tool free access is granted via the removable top spinning section which can also accommodate a range of externally mounted NEMA and Zhaga Book 18 sockets to allow full CMS or individual NEMA photocell operation.

Physical, on-site, integral power adjustment within lantern negating the need for any reprogramming device(s).

Powerset Logo

PowerSet feature available; field adjustable, integral power output selection device.


Projects with
Chalis Light Guide

Hereford Cathedral Close

The primary aim for changing the exterior lighting at Hereford Cathedral Close was to improve the reliability as the existing 45-watt Cosmo lamped lanterns were continually failing due to ballast and lamp failures, causing high ongoing maintenance costs.
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TRT Lighting supports, promotes and uses Lighting Reality for all road lighting calculations.

Photometric Database

Our complete photometric database is available for use within this industry standard lighting design package which is available for download from



  • LED colour temperature of 3000K
  • Colour rendering index >70
  • Projected L80 after 100,000 hours
  • Power factor 0.95 at full load
  • Polyester powder coat finish in light grey, dark grey, black or a bespoke colour
  • High quality high pressure die cast LM6 aluminium components
  • UV stabilised polycarbonate bowl
  • In-built ventilation (breather) plug for pressure equalisation
  • Utilising the latest low glare light guiding technology
  • CLO available
  • PowerSet feature – Field adjustable, integral power output selection device (optional)
  • Controls – NEMA 3, 7, Miniature Photocell and Zhaga Book 18 (SR) socket
  • Part Night Dimming (PND) with manual dimming override option
  • DALI compatible for use with CMS
  • Optional surge protection 10kV/10kA
  • Supplied pre-cabled with Arctic Grade PVC flex
  • Post top mounting 60mm or 76mm
  • Tool-less access
  • UMSUG codes available for full product range

Range Overview

Chalis SYM LGP Chalis ASY LGP
System Power 23-47W
Road Optics
Area Optics
Lumen Output Up to 4,749lm Up to 4,808lm

Electrical Characteristics

Chalis SYM LGP Chalis ASY LGP
System Power 23-47W
Lumen Output Up to 4,749lm Up to 4,808lm
Lumen Maintenance Projected L80 after 100,000 hours
Drive Current 504-960mA
Driver Output Constant current output with AM dimming
Power Factor
(Full Load/Half Load)
Operational Voltage 220-240VAC rms
Operating Frequency 50/60Hz
Inrush Current
Running Current
Surge Protection
Additional Surge Protection
(On Request)
Lighting Controls Options NEMA 3, 7, Miniature Photocell, Zhaga Book 18 (SR) socket, PND and CMS compatible
Dimming Protocols DALI

Mechanical Characteristics

Housing Material High quality die cast aluminium
Bowl Material UV stabilised polycarbonate
Lens Material PMMA
Housing Finish Chromate free pre-treatment, polyester powder coat, light grey (RAL9006), dark grey (RAL7022), black (RAL9005) or bespoke colours on request
Ingress Protection Rating IP66
Weight 8kg
Wind Area 0.14m²
Impact Resistance Rating IK10 (bowl)

IK08 (top)

Mounting Methods Post top 60mm or 76mm