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(2) Sylvania M400/C/U metal halide lamps
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Most recent pickup from school last week. I mainly took them because of their BT-37 shape, which it still didn't have any specimen of so far! They're both burnt out, and all my attempts to light them up have been unsuccessful, including the 250W HPS ballast. Only the current-limited MOT could strike an arc inside the arctube.
I plan to expose them, along with the failed Philips 250W mercury lamp and the ED37 400W mercury lamp.
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