Light_Vocabulary

TERMS: **Ambient Lighting ** The general lighting present in an area --excluding task lighting and accent lighting but including general lighting and daylight streaming in.

** Bayonet Base ** a type of lamp base with pins that serve to lock the lamp into slots in the lamp socket of a luminaire. The bayonet base got its name from the method used by soldiers to mount bayonets on their rifles **Beam Spread **:  a measure of the spread of light from a reflectorized light source, a special-shaped lamp with a reflective coating inside the bulb to direct the light forward. The beam spread may be very narrow (narrow spot), very wide (wide flood), or something in-between (narrow flood, for example). Examples of "reflectorized light sources" are MR11, MR16, PAR20, PAR30, PAR38, R40, ER30, and BR30 lamps. A loose way of referring to a lamp. "Bulb" refers to the outer glass bulb containing the light source. **Chandelier **:  a chandelier is often the focal point of the dining room. As such it should be hung about 30 inches above the tabletop and should be at least 6 inches narrower than the table on each side. **Cove Lighting ****:**  a lighting system comprised of light sources shielded by a ledge or recess, and distributing light over the ceiling and possibly the upper part of the wall. To learn more about this topic click Cove Lighting. **Hardwired **<span style="font-family: Tahoma,sans-serif;">**:**  <span style="display: block; font-family: Tahoma,sans-serif; font-size: 90%; text-align: justify;">technically means that the light fixture is permanently connected to an electrical source. The light fixture is not hardwired if it gets power via a cord & plug. **<span style="font-family: Tahoma,sans-serif;">High-Bay Lighting ** <span style="display: block; font-family: Tahoma,sans-serif; font-size: 90%; text-align: justify;">Lighting designed for (typically) industrial locations with a ceiling height of 25 feet and above. ** Sky Glow ** : also, known as "light pollution". The "haze" or "glow" that surrounds highly populated areas and reduces the ability to view the nighttime sky. Specifically, light that enters the sky from an outdoor lighting system by indirect light reflected from atmospheric particles such as fog, dust, or smog **<span style="font-family: Tahoma,sans-serif;">Torchiere **<span style="font-family: Tahoma,sans-serif;">**:**  <span style="display: block; font-family: Tahoma,sans-serif; font-size: 90%; text-align: justify;">a tall floor lamp that provides indirect lighting with its light source located within a reflecting bowl that directs the light upward, which then reflects off the ceiling **<span style="font-family: Tahoma,sans-serif;">Wall Washing **<span style="font-family: Tahoma,sans-serif;">:  <span style="display: block; font-family: Tahoma,sans-serif; font-size: 90%; text-align: justify;">a lighting technique that produces a relatively smooth, even level of illumination on a wall that minimizes the apparent texture of the surface
 * <span style="font-family: Tahoma,sans-serif;"> Blackbody ** <span style="display: block; font-family: Tahoma,sans-serif; font-size: 90%; text-align: justify;">A hot body with an incandescent black surface at a certain temperature used as a standard for comparison. Note that a black surface is the best radiator possible. A tungsten filament will emit slightly less radiation than a blackbody at the same temperature.
 * <span style="font-family: Tahoma,sans-serif;">Bulb: **