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  • Duoproof
  • Duoproof

A range of sealed, IP65 rated, recessed fluorescent 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: mild steel, white powder coated finish
Frame: mild steel with welded corners, EPDM gasket, with white powder coated finish (RAL 9016)
Diffuser: clear, prism, TP(a)

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. Luminaire lamps must run parallel to the spring tees. 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 luminaire for fluorescent T26 (T8) 18/36/58W, 14/24/28/35/49/54W T16 (T5) and 36W TC-L compact fluorescent lamps. Frame design with welded corners, EN ISO 14644-1 Cleanliness Class 5-9, diffuser.
As Thorn Duoproof.

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Duoproof LED

Duoproof T16

Duoproof T16 dimmable

Duoproof T16 emergency

Description   TypeSocketWt (kg)SAP Code
DUOPRF 2X28W T16 HF E3 IP65FDHG510.5096232439
DUOPRF 2X28W T16 HF E3 IP65 L840FDHG510.5096535750
DUOPRF 2X28W T16 HF E3T IP65FDHG510.5096232440
DUOPRF 2X35W T16 HF E3 IP65FDHG512.4096232447
DUOPRF 2X35W T16 HF E3 IP65 L840FDHG512.4096535752
DUOPRF 2X35W T16 HF E3T IP65FDHG512.4096232448
DUOPRF 2X49W T16 HF E3 IP65FDHG512.4096232451
DUOPRF 2X49W T16 HF E3 IP65 L840FDHG512.4096535754
DUOPRF 2X49W T16 HF E3T IP65FDHG512.4096232452
DUOPRF 2X54W T16 HF E3 IP65FDHG510.5096232443
DUOPRF 2X54W T16 HF E3 IP65 L840FDHG510.5096535756
DUOPRF 2X54W T16 HF E3T IP65FDHG510.5096232444
DUOPRF 4X14W T16 HF E3 IP65FDHG510.7096232431
DUOPRF 4X14W T16 HF E3 IP65 L840FDHG510.7096535758
DUOPRF 4X14W T16 HF E3T IP65FDHG510.7096232432
DUOPRF 4X24W T16 HF E3 IP65FDHG510.7096232435
DUOPRF 4X24W T16 HF E3 IP65 L840FDHG510.7096535760
DUOPRF 4X24W T16 HF E3T IP65FDHG510.7096232436
DUOPRF 4X28W T16 HF E3 IP65FDHG512.5096232459
DUOPRF 4X28W T16 HF E3 IP65 L840FDHG512.5096535762
DUOPRF 4X28W T16 HF E3T IP65FDHG512.5096232460
DUOPRF 4X54W T16 HF E3 IP65FDHG512.5096232463
DUOPRF 4X54W T16 HF E3 IP65 L840FDHG512.5096535764
DUOPRF 4X54W T16 HF E3T IP65FDHG512.5096232464

Duoproof T16 dimmable, emergency

Duoproof T26 luminaires

Duoproof T26 emergency luminaires