Written by Gladys Getz at Monday, November 13 2017 14:05:03 for Lighting Fixtures
The more transparent the lighting fixture is, the higher efficacy. Shading the light will normally decrease efficiency but increase the directionality and the visual comfort probability.
The PH-lamps are a series of light fixtures designed by Danish designer and writer Poul Henningsen from 1926 onwards. The lamp is designed with multiple concentric shades to eliminate visual glare, only emitting reflected light, obscuring the light source.
The most common form of ceiling lighting is the basic dome light also know as a flush mount ceiling light. These are great for basic lighting of a small room. These do not provide much task lighting it is primarily used to for basic lighting needs. Most lighting manufactures have several sizes of these and the most common ones have anywhere from 1 to 3 light bulbs. One great form of ceiling lighting. Is the Recessed Can light. This is very versital and can be used for task lighting, accent lighting or task lighting. Recessed lights have many variations in baffles and lenses. The most common type is your standard baffle trim. The baffle provides ambiant room lighting. You can create task lighting with the cans by adding a spot also commonly known as an eyeball. You can focus the light with these on a area to creating a working area or you can high light a piece of artwork or furniture.
With the discovery of fire, the earliest form of artificial lighting used to illuminate an area were campfires or torches. As early as 400,000 BCE, fire was kindled in the caves of Peking Man. Prehistoric people used primitive lamps to illuminate surroundings. These lamps were made from naturally occurring materials such as rocks, shells, horns and stones, were filled with grease, and had a fiber wick. Lamps typically used animal or vegetable fats as fuel. Hundreds of these lamps (hollow worked stones) have been found in the Lascaux caves in modern-day France, dating to about 15,000 years ago. Oily animals (birds and fish) were also used as lamps after being threaded with a wick.