Product Details

440T/THO Series T5 or T5HO Troffer Fluorescent Light Fixture

Product Overview

The Series 440T / 440THO is a slim 2 1/4” product that is suited to being used in paint spray booths (with recessed flange mount option) & clean room applications where a lay-in troffer application is desired. The Series 440T / 440THO is a vapor & dust proof product with ETL listings of Class I Division 2 & Class II Division 2. ETL listed for U.S. and Canada. This series comes in 4 lamp configurations of either T5 28W or T5HO 54W lamp options. Both utilize a specular insert for increased light output. Lamps not included. LAMPS SOLD SEPARATELY. Lay-in Mount is standard, Other mounting options ordered separately. Listed for locations having deposits of readily combustible paint residues.


Front Access troffer style. Standard lay-in mounting. (2' x 4' Grid)
90 degree self-contained hinge system (reduces overspray and dust)


20 Gauge enclosed Sealed & Gasketed post painted white powder coated finish.


3/16" prismatic tempered glass lens.


Available in 28 and 54 watts with T5 and T5HO lamps 120-277 and 347-480 volt universal ballast. Hub location varies, dependent on mounting style and customer preference. Paint spray cutoff switch for front door frame access.


Highly reflective white finish with a specular insert for increased light output.


Normally open magnetic switches are intended to be used to trigger a relay (furnished by others) which disables the paint system. Because of the small capacity of the switch a solid state relay is recommended. It may be desired by others to utilize a separate power supply to segregate the relay (furnished by others) from the lighting power supply. The magnetic switch IS NOT designed to directly control light operation! The magnetic switch is rated for 10 watts resistive at a maximum of 300 VAC.


Overloading the switch circuits WILL cause failure. LDPI, Inc. recommends having a certified electrician/engineer review loads to ensure that overloading of switch does not occur.


UL 844
CSA 22.2 No. 137.0
Paint Spray Listed
UL 1598 Wet / Damp
CSA 22.2 No. 250.0
Class I   D2 Groups A,B,C,D   T3C 160°C
Class II   D2 Groups F,G   T3C 160°C
40°C Ambient Rating

More Information


  • Galvanized Steel
  • Powder Coated Steel
  • Aluminized Steel
  • PrePainted Steel

Lamp Type

  • T5 Linear Fluorescent
  • T5HO Linear Fluorescent
  • Fluorescent


  • 120-277V
  • 347-480V

Lamp Qty

  • 4 Lamp


  • 4 Ft.


  • A: Left front
  • B: Front
  • C: Back of fixture
  • D: Right front

Options: 440T/440THO Series

  • Clear Glass (deduct)
  • 5902: 8 Ft. 3-wire whip

Series: 440T/440THO/440 2x4 (select housing & hub)

  • 390440TL_ _-4425
  • 390440TR_ _-4425
  • 390440TS_ _-4425
  • 390440THOL_ _-3265
  • 390440THOR_ _-3265
  • 390440THOS_ _-3265

Options: 440T/440THO Series - Mount

  • 3330 (surface mount kit)
  • 3331 (recessed flange mount kit)
  • 3332 (box panel mount kit)

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