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Sodium-free HPS
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This parking lot light at Lowe's Home Improvement Center is burning a low-pressure xenon discharge - and has been like this for at least a year, at about the time of the last relamp, and I think it's actually a defective lamp out of the package, not a non-cycling failure. About half the HPS and metal halide lamps have failed in this parking lot - they're not doing really well on maintenance.
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