Electrical Engineering ⇒ Topic : Types of Lighting Systems
Types of Lighting Systems:-
Direct lighting In this system more than 90% of total light flux is made to fall directly on the working, plane with the help of deep reflectors. It is mainly used for industrial and general outdoor lighting.
Semi-direct lighting In this system 60 to 90% of the total flux is made to fall downwards directly with the help of semidirect reflectors, remaining light is to be used to illuminate the ceiling and the walls.
Semi-indirect lighting In this system 60 to 90% of total light flux is thrown upwards to the ceiling for diffuse reflection and the rest reaches the working plane directly except for some absorption by the bowl. It is mainly used for indoor light decoration purposes.
Indirect lighting In this system more than 90% of total light flux is thrown upwards to the ceiling for diffuse reflection by using inverted or bowl reflectors.
General reflection In this lighting system lamps made of diffusing glass are used which give nearly equal illumination in all directions.
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