Mitochondrial disease is a group of disorders caused by dysfunctional mitochondria, the organelles that generate energy for the cell.itochondrial diseases are sometimes (about 15% of the time) caused by mutations in the mitochondrial DNA that affect mitochondrial function.
1 Surface-mounted light â the finished housing is exposed, not flush with surface. 2  Chandelier. 3  Pendant light â suspended from the ceiling with a chain or pipe.  Sconce â provide up or down lights; can be used to illuminate artwork, architectural details; commonly used in hallways or as an alternative to overhead lighting.
Light Bulb Shapes and Bases. LED, CFL, halogen and incandescent bulbs are available in a variety of shapes and bases to fit your needs. Energy-efficient LED and CFL bulbs can be used in table lamps, pendant lights, ceiling fans, wall sconces and other lighting fixtures, the same as incandescent bulbs.