120V Track systems are modular and can be designed for multiple applications in nearly any interior environment. J2 Track is a two circuit track system that can control lighting fixtures separately through two switches. Any "J" style fixture can work on a J2 track system. L-Connectors are used to join two pieces of track together with power continuity to form a 90 Degree angle. L-connectors are power feedable when aligned beneath a junction box. L-connectors are offered in right and left versions - it is important to select the correct L-connector for track polarity. A great rule of thumb is to walk underneath where the track would be installed. If you have to make a left turn, that's a Left L-connector, if you have to make a right turn, that's a Right L-connector.