Dental operating light used to illuminate the field of work. This is a single light unit on a cantilever arm mounted from a column which is suspended from a moving trolley in a ceiling track. The light can be used in installations where the ceiling height is between 8 and 10.5 feet; some units can mount to ceilings as high as 13 feet. Database physical dimensions refer to the light's maximum travel dimensions centered on the ceiling mounting track. The database weight includes the light, arm and trolley. Mounting this light may require reinforcing the ceiling or hanging the mount from the underside of the slab above a suspended ceiling.