Energy saving ,High lumen maintenance,long life,High heat and mechanical resistance 1)Multi burning position version,featuring pressure krypton gasfilled and 3-coil support rings.Life time extended to 2000 hours.2)Clear or Frosted quartz glass tube.3)UV-stop version featuring the use of special quartz glass to stop the emission of UV rays.Feature:Energy saving ,High lumen maintenance,long life, ...