At first I thought to myself why I should spend so much money for such a thing ?! Did it just once ordered and was thrilled. A change in brightness, I could not tell. But the shelf life is infinite and quasie unzerstörbar.ein Keramkbrenner tears already mal.diesen burner can man with the pliers grasp or throw times, no problem with this material. Although tightness 100 percent .It find burnouts on steel instead, but that one has eliminated ruck twitch with a wire brush and further geht's.Ich now already possess 3 high-powered lamps and have every so missed a burner .. 100% satisfied. We recommend