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GL

    ADVANTAGE
  • simpliest and cheapest light source
  • well known technique
  • availability in various designs, voltages and performances

    DISADVANTAGE
  • low light output 8 - 18 lm/W
  • limited lifetime - approx. 1.000 h for standard bulbs
  • significantly reduced lifetime in case of vibrations, shock, flashing mode etc.
  • blackening of glass body with increasing lifetime
  • "yellow" light
  • relatively high loss of light energy when penetrating coloured lenses




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