GU4 12V-24V LED: Please do not install the MR11 GU4 12V-24V LED bulb in standard 100V-240V lighting, which will cause a short circuit and damage the bulb. If the voltage of the bulb is 100-240V, a transformer is needed. Using the Transformer: Please make sure the transformer is compatible with the LED bulb. Incompatibility will cause the LED bulbs to flicker. If a halogen transformer is used, all connected bulbs must reach the minimum output power of the transformer. Energy Saving: GU4 MR11 12V 4W warm white with 24 SMD LEDs, 350LM with angle 120 degree light spread. GU4 12V LED 4W equivalent to 35W halogen bulb, reduce energy consumption more than 85%. 12V LED spotlight for camping. 35mm MR11 LED: MR11 12V LED GU4 base, small size 35*35mm, easy to install. NOTE: Please check size compatibility in advance. 30,000 hours of life. No lead or mercury. No noise or flicker. GU4 12V LED recessed spotlight for caravan. Application: Ideal for garden lighting, display lighting and ceiling lighting. Used in kitchen cabinet, bathroom, showcase, dining room, living room, cabinet, caravan, motorhome, cabin, balcony, hallway, hallway, etc.