EXTRA-N-LED (Zone 2/22) and EXTRA-LED (Industrial) are now available with a light output in excess of 16,300 lumen.

STL International
2 min readDec 31, 2021

The EXTRA-N-LED range for zone 2/22 and the EXTRA-LED range for industrial applications have been fitted with a new generation of LED modules.

Due to the improved efficacy of the modules, the 5ft versions are now available with an incredible lumen output in excess of 16,300 lumen. This means that the EXTRA range of LED luminaires now offers new opportunities in high ceiling applications. Some of the luminaires can be used in ambient temperatures of up to 60°C.

In addition, the range can be supplied with DALI drivers and inverters, 1–10V dimmable drivers, Auto-test emergency inverters, Microwave sensors and Change-over switches for Central Battery operation.

To discuss your application just drop us a line solutions@stl-int.co.uk

Additional information:

To showcase capability of the EXTRA range, we have chosen a warehouse application and calculated the number of fittings required to achieve an average of 200lux at floor level.

Example 1: 5ft EXTRA-N-LED luminaire with the highest output of 16,311lm
Example 2: 5ft EXTRA-N-LED luminaire with a standard lumen output of 7,239lm
Example 3: High bay PITBUL-N-LED luminaire with a lumen output of 24,765lm

Reference building: Manned warehouse (Target illumination: 200lux)

  • Size (m): 72 x 36 x 8
  • Luminaire installation height: 6.5 m
  • Working plane 0.1 m; Boundary Zone: 0.5m
  • Maintenance factor: 0.72
  • Reflectivity: Ceiling 60, Walls 40, Floor 20



STL International

STL International Ltd is a solution provider offering a wide range of low maintenance and hazardous area LED luminaires with high performance levels.