- Eveready
- Jasco
- Keystone
- Powercell
- BWF
- Cantex
- Crouse Hindes (Thepitt)
- Ipex
- Killark
- Mulberry
- Rab
- Raco
- Taymac
- Valen
- Westinghouse
- Delta Therm
- King Electric
- Marley (Fasco, Patton)
- TPI Raywall
- Austin
- Bell Products
- Cantex
- Ipex
- Lee Products
- MillBank
- Unity
- Killark (a division of Hubbell)
- Continental Fan
- Fan Brace / Angelo
- Fantech
- Fasco
- Patton
- A and G Manufacturing
- Acorn
- B-Line
- Briscon
- Fran Dan
- Gardner Bender
- Metallics
- Minerallac
- ESL
- Firelite
- Firex
- Fyrnectics
- GE Security
- Gentex
- Kidde
- Maple Chase
- STI
- System Sensor
- Wheelock
- American Fittings
- Arlington Industries
- Bridgeport
- Briscon
- Raco
- Regal
- WG Roller
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- Osram Sylvania
- CEW Lighting
- Duro-Test
- Electro-Techs (LED Traffic)
- EYE Lighting
- General Electric
- Satco Products
- Trojan
- Venture Lighting
- Abolite
- Aladdin Fixture
- Alcastco Pole
- Best Lighting
- Brownlee
- Capri
- Cooper
- Crescent
- Daybrite
- Eastern Fixture
- Elco Lighting
- Finelite
- GE Lighting
- Halo
- Lite Smart
- Lyte Pole
- Mulberry
- New England Lighting
- Nora Lighting
- Pheonix Products
- PowerLite
- Rab
- Renova
- Satco
- Stonco
- Thomas Lighting
- Universal Fixture
- Voight Lighting
- Wide Light
- Bryant
- Furnas
- Relay & Control
- Selectra Switch
- Siemens
- Federal Pacific Transformer
- Marcus Tranformer
- Murray Electrical
- Reliance Controls
- Siemens
- Area Lighting Research
- Bryant
- Intermatic
- Mulberry
- Rab
- Alflex
- Allied Tube
- Alumax
- Cantex
- Columbia MBF
- Electri-flex
- Ipex
- Kaf-Tech
- LTV
- Maverick
- Steelflex
- United Pipe
- Electro Tape
- Gardner Bender
- Merco
- Plymouth
- Gardner Bender
- GC Thorson
- Klein
- Knopp
- Magnus
- Metallics
- Morris Products
- Morse
- Seatek
- Alcan
- Alflex
- American Insulated
- Cerro
- Encore Wire
- Genesis/Honeywell
- Kaf-Tech
- Omni
- Republic
- Southwire
- Steelflex
- Tamaqua
- United Copper
- Buchanan
- Gardner Bender
- Ideal
- Ilsco
- Klein
- Morris Products
- Selectra Terminal
- Lee Products
- Milbank
- Mono-Systems
- Wiremold
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