high pressure sodium vapour lamps
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ADVANTAGES Very high efficacy hence highly energy efficient. Long life and low light depreciation. Very short run-up time and quick re-strike. An economic alternative to high pressure mercury vapour and metal halide lamps. Very high lumen output. Golden white light admitted by lamps gives a warm appearance and better visual acuity.
sodium vapour lamp
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sodium vapour lamp, Compact Fluorescent Lamp, general lighting service lamp
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