Ceiling lighting falls under the category of general lighting. Lights could be divided according to three broad classifications, the other two being task lighting and accent lighting. Certain kinds of ceiling lights could be made into task lighting if specifically designed for such a job, but the main kind of illumination provided by lumination fixtures on the ceiling is that of downlighting, or the casting of light downward.
Illuminated ceilings might be considered a type of ceiling light, especially when found in otherwise dark nightclubs. Immensely well-known more than 3 decades ago, they’re very rarely employed nowadays, and nearly never in a residential setting.
Ceiling lighting is quite essential, and not just in the immediately obvious sense of providing illumination at home or at work. Light-sensitive individuals may be greatly disturbed by such things as the really subtle strobe-like effects associated with fluorescent lamps. In fact, there is a whole field of inquiry that exists regarding the health effects of poorly designed lighting.
Particular kinds of photopollution that relate to ceiling lighting are light trespass, over-illumination, and glare. These are difficulties frequently present in densely populated residences and workplaces. Light trespass is one familiar to college dorm mates, where one is trying to sleep while the other has to study. Over-illumination is the excessive use of light. A lot of offices keep the lights on throughout the night for office cleaners, while during the day, even when there is bright sunshine, lights are left on anyway.
This causes a lot more oil to be used than necessary (in the generation of electricity), not to mention light trespass of nearby buildings. Ceiling lights may perhaps also cause glare under certain conditions. But most ceiling lighting nowadays is developed with ergonomic considerations in mind, particularly given the phenomenon of the “sick workplace” and “sick home.”
