Building Construction (Lighting Systems - Fixtures)

Illustrate the following (answers found iint pace 263 of Building Construction): 1. Valance lighting 2. Cove Lighting 3. Cornice Lighting

Other name for lighting fixtures

90% to 100% of the light output is directed towards the ceiling. 

60% to 90% of the light output is directed upwards; 40% to 10% downwards. 

Provides approximately equal distribution of light upwards and downwards

60-90% of light downwards; 40-10% upwards

90-100% of the light output is directed downwards.

Pools of light mingled with areas of shadows. Opposite of uniform illumination. Employs lamps at definite points where light is specially needed. 

Strives for uniform intensity of light over an entire area. 

Combined local and general lighting

Effect of brightness in the field of vision which causes annoyance or discomfort

Loss of light when light rays strike or traverses any medium.

Passage of light through a medium when light falls upon transparent material. 

Directional lighting to emphasize a space or an object

Beam of light is reflected diffusely, where the ray is scatter in all directions after striking a rough or matte surface. 

A term applied to a can type of receessed incandescent downlight.

Recessed or semi recessed lighting unit with a rotating spherical element. 

Tubular fluorescent lamp with a disc base at each end

False ceiling of diffusing material with light sources mounted above

Beam of light is specularly reflected when a light ray striking a shiny or glossy surface at an angle of incidence is reflected as the same beam with equal angle of reflection. 

Electric component which consists of conducting plates insulated from each other by a layer of dielectric material. 

Quantitative measure of the electric energy storage capability of a capacitor

Unit of measurements of capacitance