Difference between revisions of "Philips MHN-TD"

Generally, metal hallide lamps fare quite poorly in terms of reliability. The aggressiveness of metal hallides and their reliance on a specific pressure and temperature requirement for vaporization and light output with a specific output, means that lamp to lamp colour shifts are quite noticeable. Aging amplifies the colour drift and light output differences. As the lamp is very compact and has high temperature hot-spots means that fixtures are noticeably degraded and especially affects gaskets and the front frame of the reflector housing. This means that waterproofing is frequently degraded and lamps are rarely suited to operate outdoors unless old fixtures are carefully maintained.

Due to the lamp being compact as well as frequent indoor applications heat degradation of the lamp gear is quite common and some design constraints may limit replacement of some ballasts and ignitors without modifying mounting points. Electromagnetic and electronic gears have been available during manufacturing but electromagnetic ballasts and ignitors were the most common ones due to lower cost. This means that special care should be taken for proper insulation and wiring and that the lamp life is slightly reduced.