Osram Parathom G4 and GU4 LED light sources are replacers for G4 and GU4 conventional light sources. These small bulbs fit in locations that have very little space to fit a light source. The LED version is designed to replace these conventional light sources 1-on-1, you don't have to make any adjustments to your fixture. However, please check de exact measurements of the LED lights, since they might slightly differ from your conventional light source. With the filters on the left, you will be able to find your perfect Osram Parathom G4 of GU4 (MR11). If you want to keep the same light effect, filter on the color code, wattage, and lumen of your current light source.