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.
A moonlight effect is achieved by putting an outdoor lighting fixture high up in a tree and positioning it such that the light is directed down wards. Silhouetting is accomplished by placing a fixture at the back of the object and directing light away from it, so that the dark contours of the object`s form are visible.
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