Uploaded by: Fred Grey
Category: Lighting Fixtures, More >>
Uploaded at: Friday, November 17 2017 15:19:54
An important property of light fixtures is the luminous efficacy or wall-plug efficiency, meaning the amount of usable light emanating from the fixture per used energy, usually measured in lumen per watt. A fixture using replaceable light sources can also have its efficiency quoted as the percentage of light passed from the "bulb" to the surroundings.
Architectural lighting design focuses on three fundamental aspects of the illumination of buildings or spaces. The first is the aesthetic appeal of a building, an aspect particularly important in the illumination of retail environments. Secondly, the ergonomic aspect: the measure of how much of a function the lighting plays. Thirdly is the energy efficiency issue to ensure that light is not wasted by over-illumination, either by illuminating vacant spaces unnecessarily or by providing more light than needed for the aesthetics or the task.
Chandeliers: Chandeliers have multiple lightbulbs combined in one unit to create a larger, more dramatic statement piece. Unlike pendants, they produce a stronger glow and therefore can often stand alone. Chandeliers are traditionally more elegant and more expensive than other indoor lighting fixtures, and therefore are used less frequently — you may see one in an entryway or a formal dining room.
Ceiling Lights are those lights that are horizontally located in a ceiling to provide light below. These are often surface-mounted fixtures located in the center of a room or hallway which cast a bright, overhead light that illuminates an entire room or area.