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  • Duoproof
  • Duoproof

A range of durable IP65 recessed luminaires

  • Welded frame corners provide a smooth and easy to clean surface
  • Diffuser frame secured by 1/4 turn fasteners for quick installation
  • Retention cords hold diffuser for easy maintenance
  • Suitable for use in cleanroom classifications to EN ISO 14644-1 (Classes 5 to 9)

Materials and Finish

Body: zinc coated sheet steel, white stove enamelled finish
Frame: extruded aluminium with welded corners, EPDM gasket, with white stove enamelled finish (RAL 9016)
Diffuser: opal PMMA

Installation and Mounting

Designed for installation into various ceiling types. Suitable for exposed tee ceiling grids using 15mm or 24mm tee widths and a maximum tee height of up to 50mm. In solid/plaster board ceilings suitable apertures are recommended to support the weight of the luminaire. Luminaires are not suitable for use in concealed ceilings or certain spring tee ceiling grids such as SAS 120 / Armstrong Orcal 1800. When installed into an SAS 150 / Orcal 3000 spring tee ceiling grid the luminaire diffuser frame will not fit flush to the ceiling tile. Please consult the ceiling manufacturers technical specification for compatibility. Duoproof has 4x 8mm holes for suspension rods in the housing. Grommets supplied. 20mm cable entry holes are provided. Diffuser is held in by 1/4 turn fasteners and retention cord.


To specify state:
Recessed IP65 sealed LED luminaire. Frame design with welded corners, EN ISO 14644-1 Cleanliness Class 5-9, diffuser.
As Thorn Duoproof.

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Duoproof LED

DescriptionLuminaire power (W)Luminaire output (lm)   Catalogue No.TypeWt (kg)SAP Code
DUOPRF LED3800-840 HF 1200X300374000DP3800Z12X3LED7.1596628428
DUOPRF LED3800-840 HF E3 1200X300374000DP3800ZE12X3LED7.6796628429
DUOPRF LED3800-840 HFI 1200X300374000DP3800D12X3LED7.1596628430
DUOPRF LED3800-840 HFI E3 1200X300374000DP3800DE12X3LED7.6796628431
DUOPRF LED4100-840 HF E3 Q600343800DP3800ZELED9.0096628425
DUOPRF LED4100-840 HF Q600343800DP3800ZLED7.5096628424
DUOPRF LED4100-840 HFI E3 Q600343800DP3800DELED9.0096628427
DUOPRF LED4100-840 HFI Q600343800DP3800DLED7.5096628426