Osram is one of the leading companies in providing lighting solutions over the decades. OSRAM is evolving from the leading lighting producer to the high-tech champion of photonics. Photonics covers the entire technological range of visible and invisible light.These are Professional LED lamps, you can not dim them, they emit a warm white light. The lamp caps are 5.3mm apart. GU5.3 bulbs are safer in moist rooms than 230 Volt halogen lamps, because they operate on 12 Volt. .(1)Professional LED lamps(2)6.5 Watts Warm white.(3)Mercury-free lamps.(4)Not Dimmable.