1\Filament:
  Filament resistance meet with the elecric parameters.
  Coated with the enough electronic powder and ensure to complete the decomposition.
  Thick tungsten wire and high resistance,properly increase a coiling wire diameter

and spiral distance.
2\Electronic powder
   Particles are normal distribution,strong adhesive ability.
   High Ba and emission density,strong hih temperature resistance.
   Properly increase the Ca,enhance the impact resistance ability.
   Add the rare earth oxid,prolong life.
3\High purity quartz glass tube
  The hydroxyl content must be less than 5ppm.
  The UV ray transmittance of the glass tube should be above 93%.
  Uniform thickness of the quartz glass tube,good consistency.
4\Protective film
  Uniform and compact coating
  Keep on continuing compact even after 600℃ high temperature.
  Three layers protect.
5\Amalgam
  Ensure that the lamp UV output over 93% in fluctuate 50℃ temperature range.
  Ensure that the lamp UV output over 93% even lighting in any direction.