An inefficient fixture may absorb huge amounts of light, consequently reducing the amount of light distributed, or radiate the light to various cavities in the ceiling. The light efficiency of the fixtures can be maximized by regularly cleaning the dirt, and cobwebs from the shades and fixtures.
For example, a halogen bulb should always be housed in an enclosed lighting fixture to avoid the dangerous consequences of a burst halogen bulb. The fixture has to be evaluated on various other parameters, like what type of task it is chosen for, what is the kind of light distribution can be expected from it(given its shades, shape, color, etc.), how does it effect the efficiency of the bulb and what kind of color distribution does it render. Hence, choosing a lighting fixture purely on aesthetic criteria is not a judicious decision.
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