... 31 sorts,they are Heating Elements:Silicon,Calcium, Chromium, Manganese, Iron, Copper,Zinc, Cobalt, Tin, Boron, Sulphur, Selenium, Cadmium, ... It wouldn’t make skin singe like old TDP lamp,as it will be constant automatically when reaching some ... for evironmental protection.6) Save energy:30% than ordinery TDP lamp.Technical parameter:Voltage: 110V/ 220VFrequency:60Hz/50HzPower < 750WAzimuth (Degree ...