Ultimate High Specification Weatherproof.


Tridonic LED and driver technology in a rugged GRP body with a PMMA opal diffuser. The GTB66 is available in 4ft and 5ft and a range of colour temperatures to suit your application including full external mounting.

Standard Features

  • High specification GRP housing for ultimate product durability in tough environments.
  • Silicone gasket and IP66 Breather Gland to allow full external mounting.
  • Stainless steel clips supplied as standard.
  • Opal PMMA diffuser to create a uniform and diffused spread of light.
  • 4000K as standard. Also available in 2700K, 3000K, 5000K and 6500K.
  • Available with EyeWi wireless controls. 


  • Warehousing
  • Car parks
  • Cold stores
  • Factories
  • Water treatment plants
  • Manufacturing plants
  • Supermarkets
  • Food preparation

Ambient Temperature Guidance

-20°C to +35°C

Luminaire is suitable for full external mounting. Please speak to the Wirefield Sales Office for more information.

GTB66 Specification Guide

Order Code Wattage Delivered Lumens (ta +25°C) System Efficacy (lm/W) CCT-K L (mm) W (mm) D (mm) Weight (kg)
GTB32/66/4K 22W 3,201 145 4000 1277 116 99 4.2
GTB64/66/4K 44W 6,403 145 4000 1277 116 99 4.2
GTB33/66/4K 23W 3,361 146 4000 1577 116 99 5.8
GTB46/66/4K 33W 4,614 139 4000 1577 116 99 5.8
GTB67/66/4K 45W 6,724 149 4000 1577 116 99 5.8
GTB92/66/4K 65W 9,229 141 4000 1577 116 99 5.8

To Order Features

(Add suffix to order code)

Sensor Options

100%/10% (never off) dimming with integral microwave sensor
Microwave sensor for On/Off
Dimming control with EyeWi wireless control and integral microwave

Emergency Options

3hr integral emergency (not suitable for use below 0°C)
Self-test wireless reporting 3hr emergency (not suitable for use below 0°C)

Example Order Code

GTB/66/4K/LS36 – A GTB66 44w luminaire plus dimming control with EyeWi wireless control and integral microwave.

GTB66 Dimensions

GTB66 Dimensions

Note: All dimensions are in millimetres.

GTB66 Photometry

Please contact us for further information regarding this product.

GTB66 Downloads