12V GU 5.3 / GX5.3 LED 7W replaces 50W allogen, 550Lumen, Voltage: AC / DC 12V (AC12V or DC12V LED transformer required), not dimmable, Dimension (ØxL): 50 x 55mm 12V LED spotlight: Better to use an LED transformer. If you connect a halogen transformer, please make sure the full power of the LED bulbs reaches the lowest wattage of your transformer, otherwise they may flicker strongly 12V 50W floodlight: high CRI Ra82 with super 2835SMD, report lighting. Energy efficiency class A +, has a long service life, saves up to 90% energy LED halogens: CE, EMC and RoHS certified. No flicker, no UV or IR radiation. Made of high-quality materials with excellent heat dissipation MR 16 COB dimensions: 50x55mm. Eye: Body rim slightly larger than halogen, if you replace halogen, please make sure lighting dimension fairly