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.
Recessed lighting fixtures â aka housings, cans, high hats, or pot lights â are the part of recessed downlights that sit above the ceiling. They provide the structure to attach the wire connections, the trims, and lamps or LEDs. The basic components that make up a recessed light fixture.