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.
For task lighting, choose a pendant that is open at the top so the light underneath is not too harsh. If you need overall light, space pendants evenly throughout the room or over the work area. A general rule: The larger the area you want to light, the bigger the pendant light should be. A small pendant light is effective over a sink or desk area. Cluster small pendants or choose a pendant with three or more lights over a dining room table or kitchen island.