【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 bulb voltage is 100-240V, a transformer is required. 【Transformer Use】: 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, 400LM with a 120-degree beam angle. GU4 12V LED 4W equivalent to a 35W halogen bulb, reduce energy consumption by more than 85%. 12V LED spotlight for camping. 【35mm MR11 LED】: MR11 12V LED GU4 base, small size Ø35*35mm, easy to install. NOTE: Please check size compatibility in advance. 30,000 hours of life. No lead or mercury. No noise or flickering. GU4 12V LED recessed spotlight for caravan. 【Application】: Ideal for garden lighting, exhibition lighting and ceiling