There are three standard types of tracks used worldwide. They are often termed "H", "J", and "L" track, after the names of the manufacturers that established the standards, Halo, Juno, and Lightolier.
The global market employs three primary types of tracks. These are commonly known as "H", "J", and "L" track, following the names of the companies that established these standards, Halo, Juno, and Lightolier.