AC/DC 12V: Compatible with 99% of transformers. LED or halogen transformers can be used. When using halogen transformers, they must meet the minimum power requirements. If you are unsure of the type of transformer you have, you can connect a halogen bulb. GU5.3 LED Bulb, MR16 LED 6000K Standard GU5.3 fittings that can be easily installed to replace ordinary GU5.3 halogen spotlights. Extremely long lifespan; MR16 LED bulbs have a lifespan of 20,000 hours, saving energy, time, and money. No flickering, flashing, or glare; eliminates eye strain and protects your family's eyesight. AC/DC 12V LED Spotlight Please ensure your transformer is compatible with the GU5.3 MR16 LED bulb. If you wish to connect a halogen transformer, ensure that the total power of the LED bulbs matches the lowest power rating of your transformers; otherwise, they may flicker excessively. High CRI (Color Rendering Index) and a high CRI (CRI >= 80) result in a more vivid and natural color. Specification: Type: 3W LED