TIGREZY - High quality products and satisfactory customer service at a reasonable price AC / DC 12V LED spotlight: it is better to use a LED transformer. If you want to connect a halogen transformer, please make sure all the power of the LED bulbs reach the lowest wattage of your transformers, otherwise they may flicker heavily MR 16 / GU5.3 / GX5.3 5W LED Replaces 50W Halogen, 450Lumen, Voltage: AC / DC 12V (AC12V or DC12V LED transformer required), Non-dimmable, Dimensions (Ø x L): 50 x 46 mm Durable GU5.3 Reflector: With CE, EMC and RoHS certification. No flickering, no UV or IR radiation. Made of high quality materials with excellent heat dissipation 12V 50W Cool White Floodlight: High reflective index Ra80 with super 30 x 5730 SMD, uniform illumination. Energy efficiency class F, long life, energy saving up to 90% Service: Attention!! Please make sure your transformers are LED or halogen transformers, if they are halogen transformers, they may cause MR16 LED bulbs to flicker,