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LineFit Light-LED (LFL-LED)

Installation Guide

2

Installation

Turn off power and remove panel 

from fluorescent box sign.

Push Line Fit Light into existing 

fluorescent lamp holders.

Read the product labels to 

determine Line Fit Light length 

required to span width of 

sign based on table in the 

Specifications section (last page). 

Old Fluorescent tube

F48T12HO 

or F48T8HO

Remove old fluorescent tubes, 

ballast and wiring. DO NOT remove 

existing fluorescent lamp holders.
NOTE: Follow all federal and 

local regulations when disposing 

of neon tubing, fluorescent tubes, 

transformers and ballasts. 

Remove old components

Continue installing Line Fit Light 

fixtures.

Orient Line Fit Light so LEDs are facing 

front of sign, then pull and twist the 

two endcap fittings so they align with 

existing fluorescent lamp holders.

LEDs face 

front of sign

Pull and twist endcap fitting 

to align with lamp holder

Prior to installation, survey the site for information regarding power and accessibility inside and outside the building.  Ensure that the branch 

circuit supplying the existing transformer or ballast will be within the voltage ratings of the new LED power supply, and have a current rating not 

exceeding 20A, or that permitted by applicable local, state, or country electrical codes (whichever is less).
If removal of the existing lighting equipment (see Step 2) eliminates the disconnect switch, as required by applicable local, state, or country 

electrical codes; a new disconnect switch must be installed.
If required, the disconnect switch shall be installed by qualified personnel, in accordance with applicable  local, state, and country electrical codes.
Repair and seal any unused openings in the electrical enclosure. Openings greater than 12.7-mm (1/2-in) diameter require a metal patch 

secured by screws or rivets and caulked with non-hardening caulk. Smaller openings may be sealed with non-hardening caulk.
NOTE: If component 6 is necessary, refer to 32619 LFL-LED Coupler2 Line Fit Light Coupler-2nd Gen Installation Guide. If component 7 is necessary, 

refer to 33125 LFL-LED Sockets LineFit Light Sockets Installation Guide.

GEF48xxxHOLED-1

New LED retrofit

Components

UL certified 18 AWG (0.82 mm

2

) supply wire

UL certified 22-14 AWG (0.33-2.08 mm

2

) wire connectors 

or 22-18 AWG (0.33-0.82 mm

2

) inline/IDC connectors

End caps 
Tetra

®

 24 Volt Power Supply

LineFit Light-LED (LFL-LED) modules
32619 LFL-LED Coupler 2 Line Fit Light Coupler-2nd Gen (optional)
93020091 LFL-LED Sockets LineFit Light Sockets (optional)

T

C

 Measure Point

The existing socket should be push-in 

double contact lamp holder

Electrical grade RTV silicone. 

Example electrical grade RTV silicones include:

•  Momentive RTV 6700 Series Silicone Rubber Adhesive Sealant

•  Momentive White Blanc RTV 162 Silicone Rubber Adhesive Sealant-

Electrical Grade

•  Dow Corning 3140 - Non-Corrosive Flowable (clear)

•  Dow Corning 3145 - Non-Corrosive Nonflowable (clear or gray)

•  Dow Corning RTV 748 Non-Corrosive Sealant-White

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