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Jun 8, 2015 at 15:48 comment added supercat Not only is the envelope close to the filament, but the filament itself gets much hotter than in an incandescent bulb.
Jun 8, 2015 at 3:31 comment added Random832 " (reducing UV emissions is another function.)" - more to the point, the glass shield is there because the actual bulb is quartz, which can stand higher temperature and doesn't block UV.
Jun 8, 2015 at 1:46 history edited Ecnerwal CC BY-SA 3.0
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Jun 8, 2015 at 1:37 history edited Ecnerwal CC BY-SA 3.0
added 341 characters in body
Jun 8, 2015 at 1:31 history answered Ecnerwal CC BY-SA 3.0