- LEVITON
- LEESPRING
- LSELECTRIC
- LUTRON
- LUMIGLAS
- LINOMT
- LOVATOELECTRIC
- LAUMAS
- LAMTEC
- LNK
- LORENZ
- LOCK
- LI-MING
- LANG
- LANTECH
- LEVITRONIX
- LIFTALL
- LANDEFELD
- LESER
- LAVOR
- LUETZE
- LUEN
- LOVATO ELECTRIC
- LUBE
- LESKER
- LUTZ
- LABOM
- LYTZEN
- LONGEN
- LOC-LINE
- LENORD+BAUER
- LABFACITTY
- LINMOT
- LAPP
- LEEG
- LAPAR
- LECO
- LAFERT
- LEVELDEVELOPMENTS
- LIVERANI
- LUCAVAL
- LASAULEC
- LARZEP
- LEM
- LEGRAND
- LEUZE
- LIKA
- LUDECKE
- LYNAIR
- LAFAYETTE
- LR-CAL
- LANAMATIC
- LEYBOLD
- LANG APPARATEBAU
- Lake monitors
- LACLUSIENNE
- LCM
- lumberg
- Lim-Tec
- LEE