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.
heidigoNovember 10, 2011. Ack!! I planned to do research tonight to determine how high to mount the pendants above the island countertop, but the electrician showed up today - was supposed to be tomorrow - and wants to install pendant lights above the island. Anyone have any guidelines on how high above island countertop they should be??