Osram Decostar halogen bulbs come with light of good quality, an excellent color display and possess a UV-filter. Because of this filter, illuminated objects are protected against discoloration and heat that the light bulb emits. The Osram halogen bulbs work with 12V and therefore need an Osram HTM Halotronic to be connected to the power network. The Osram Decostar light bulbs are available in a GU4 and GU5.3 base. The difference between the two lies in the distance between the pins (4mm and 5.3mm). The Osram GU4 and GU5.3 halogen bulbs are dimmable and free of mercury.