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Last remaining conventional streetlights 1Max
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Last remaining conventional streetlights 2Max
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Last remaining conventional streetlights 3Max
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Last remaining conventional streetlights 4Max
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Philips HPI-T Plus 400WMax
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Bare Philips HPI-T 400W burnerMax
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Sylvania MS400/PS/BUMax
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UV-IR imaging of medium-pressure mercury arc and electrodeMax
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Spectacular failureMax
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Old Philips Museum - part 1Max
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Old Philips Museum - part 2Max
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Old Philips Museum - part 3Max
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Old Philips Museum - part 4Max
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Old Philips Museum - part 5Max
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Old Philips Museum - part 6Max
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Old Philips Museum - part 7Max
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Running a rare 15 W metal halide lampMax
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Working glassMax
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Filtered sodium lampMax
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