Engineering utilities reviewer 2

(a)   are any type of asymmetric luminaire that is intended to flatly light the wall from the ceiling down to the floor.

(a)   is a kind of lighting system which utilizes luminaires which send most of the light downwards directly on the working plane but a considerable amount reaches the ceilings and walls also.

(a)   is given by the ratio of luminous flux reflected from a small area of a surface to the total flux incident upon it.

(a)   is a kind of lighting system which lies between the direct and indirect lighting where in the light is partially received by diffuse reflection and partly direct from the source.

(a)   is a kind of lighting system in which luminaires are employed which have almost equal light distribution downwards and upwards.

(a)   are specially designed to illuminate a desk area while minimizing veiling reflections.

(a)   is the intensity of sensation resulting from viewing light sources and backgrounds.

(a)   are widely used in offices, stores, schools, and other commercial and institutional facilities for general lighting in work and sales areas.

(a)   is any device that includes a lamp holder and the means of electrification and support for that device.

(a)   is the ratio of the lumens actually received by a particular surface to the total lumens emitted by the luminous source.