Track lighting is available in two types, linear and monorail that are available in line voltage and low voltage configurations.
Types of Track
Linear Track - This type is typically mounted flush against a ceiling or wall, and uses linear strips of track that come in 2-foot, 4-foot, 6-foot, 8-foot and 12-foot lengths. It allows you to create a custom layout with various shapes of connectors that are designed to join the pieces of track together. You can also choose the style of lights that coordinates with your décor and place them anywhere along the track.
Monorail Track - Unlike linear track, monorail is suspended from the ceiling or protrudes from a wall using standoffs. This type of track offers a more sleek, contemporary look. It also comes available in complete kits, which includes the track, pre-attached light heads, and mounting hardware.
Difference between line voltage and low voltage
Line Voltage Systems - These track systems can be installed using a home's 110-120 volt power, just like conventional lighting fixtures.
Low Voltage Systems - To install these track systems, a low-voltage transformer is needed to convert or step-down the regular current in your home to a lower voltage, which is typically 12-volts. Even though there is more parts and labor required from this type of system, the light output is more controlled and focused.