Color: Warm White 3000K. ACDC 12V: Compatible with 99 of transformers. LED transformers or halogen transformers can be used. When using halogen transformers, a minimum power must be achieved. If you are unsure of the type of transformer you have, you can connect a halogen lamp. LED spotlight ACDC 12V. Make sure your transformer is compatible with the GU5.3 MR16 LED lamp. If you want to connect a halogen transformer, make sure the total power of the LED lamps reaches the minimum power of the transformer, otherwise they may flicker heavily. Excellent choice 5W MR16 GU5.3 LED spotlight lamp. Excellent color consistency, high quality lighting is ideal for use in places that require brighter light. Specification: Type: 3W LED spotlight. Socket: MR16GU5.3. Voltage: AC DC 12V. Lumen: 450 Lumen. Color: Warm White 3000K.