Color: Warm white 3000 K. AC/DC 12V: Compatible with 99% of transformers. LED or halogen transformers can be used. Halogen transformers must meet the minimum power requirement. If you are unsure of your transformer type, you can connect a halogen bulb. AC/DC 12V LED Spot 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 wattage of the LED bulbs matches the lowest wattage of your transformers; otherwise, they may flicker excessively. Superb choice! 5W MR16 GU5.3 LED spotlight bulb. Excellent color consistency and high-quality lighting performance are ideal for use in locations requiring brighter light. Specification: Type: 3W LED spotlight; Base: MR16 / GU5.3; Voltage: AC/DC 12V; Lumen: 450 lumens; Color: Warm white 3000K.