Take a look at our Circular Tubes! Circular Tubes are often used in flat fixtures for decorative use. Circular Tubes provide an even light in any direction due to its circular form. When changing your Circular Tube, check if you pick the right socket: 2GX13 or G10q. Make sure the wattage and color remain the same keep your light effect as your current lamp. Use the filters on the left to find the perfect circular tube.