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.
Once you've picked out a pendant light or set of lights to hang above a bar, determining the ideal hanging height for the lighting may seem a bit confusing at first. In general, 30 to 40 inches of air space between counter and the bottom of the pendant allows enough room to avoid bumping into the lights while also providing ample light. The ideal distance for your particular setup may vary based on the heights of guests using the bar, seated or standing.