EXAMIANS
Luminous efficacy of a typical HPSV lamp is in between
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Which lamp has the best Colour Rendering Index (CRI)?
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Which lamps can be directly connected to a solar cell?
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What is the ratio of illuminance at a point 5m just below a lamp emitting 100 candelas and at a point 5m away from the first point on the same horizontal plane?
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Wave length for red colour is around
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Which lamp has a negative Colour Rendering Index (CRI)?
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Candela is the unit of which?
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The range of visual spectrum is
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From a uniform light source having luminous intensity of 300 candelas, there exists a plane surface 15 m below. The value of illuminance at a point on the plane surface where the luminous flux rays are inclined at an angle of 30 to the surface is
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___________________________ factor is defined as the ratio of the illumination when everything is clean to illumination under normal working conditions.
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