Difference between revisions of "Philips ML"

Philips ML (view source)

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 == Suitability ==
-The best lamps in terms of useful lifetime, colour reproduction, light output, are the equivalent OSRAM HQL branded lamps, not Philips HPL-N lamps even if Philips lamps were very popular. Chinese branded lamps are much worse in all performance and quality metrics with a greener light output and poor reproduction of oranges and reds. Reflector lamps are generally less versatile than the classic one for most purposes but they do not require any fixtures in most instances.
+The best lamps in terms of useful lifetime, colour reproduction, light output, are the equivalent OSRAM HWL branded lamps, not Philips ML lamps even if Philips lamps were very popular. Chinese branded lamps are much worse in all performance and quality metrics with a greener light output and poor reproduction of oranges and reds. The Philips lamps lacked high quality coatings, especially in newer lamps, so lighting quality and colour reproduction was slightly affected.
-The best choice of wattage are the 125 and 250 watt lamps as lower wattages have quite a low light output and larger powered lamps are bulky and too powerful for most purposes. The above lamp wattages are also cheaper as they were highly popular. Electro-magnetic ballasts or conventional gears are plentiful and can be used interchangeably with all manufactured lamps for a specific wattage. Lower rated power output gears can be used, making the lamp operate dimly but higher powered ones damage the lamp due to overstressing and are dangerous.
+The best choice of wattage are the 160 and 250 watt lamps as the 100W lamp has low light output and efficiency. The 100W lamp is a strange case of a design that is even less efficient at lighting than a typical 100W incandescent lamp, due to compromises in the mixed lightin lamp design. Higher power rated lamps, such as the 500W were more efficient but the lamp's size clearly was a major disadvantage. In such situations a typical standard high pressure mercury vapour lamp with half power rating oferred much better efficiency despite requiring a bulky electromagnetic ballast.
-Used lamp gears might work but old lamps are not as desirable. Rusted ballast may still operate but are a potential hazard while old, used lamps, may not have much useful life left and they may already exhibit some colour light emission issues. New old-stock lamps are the best choice, if available.
 == History ==