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Vintage mercury vapour discharge lamps with E40 GES screw caps. Old or retro lightbulbs. Retro. Steampunk. High pressure mercury, medium pressure Stock Photo - Alamy
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GEC / Osram 400W MA/V medium pressure mercury vapour lamp, an early example of mercury lamp. Made in the UK Stock Photo - Alamy
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Emission spectra for low-and medium-pressure mercury lamps, sunlight... | Download Scientific Diagram
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