Monorail Systems
Track Lighting can provide general, task, or accent lighting all at once in one flexible lighting system. You can move, swivel, rotate, and aim the individual fixtures in any direction along the track, giving you the versatility to change your lighting scheme when the need arises. You can also hang pendants from the track. Track fixtures are available in standard or low-voltage current, and a choice of incandescent, tungsten-halogen, and energy-efficient compact fluorescent or the new high-performance, energy-saving, light-emitting diode (LED).
Things to consider before installing a track system:
1.) Always consider the weight of the track, lamp and fixture.
2.) Ceiling height is crucial, any height higher than 9 ft will surely need longer rods.
source: http://www.americanlightingassoc.com/info_lighting4.php
source: http://www.techlighting.com