【Use a Transformer】Note: Please ensure the transformer is compatible with the LED bulb. Incompatibility will cause the bulb to flicker. If a traditional halogen transformer is used, all connected bulbs must meet the transformer's minimum output power. 【Energy Saving】The MR11 GU4 3.5W LED bulb can perfectly replace a 25-35W halogen bulb, saving up to 90% on your lighting electricity bill. It has a lifespan of up to 25,000 hours, reducing costs by decreasing the replacement frequency. It can only be used under 12V. 【High CRI, Healthy Atmosphere】CRI > 80 Ra, high color reproduction, free of harmful lead and mercury, CRI > 80 ensures a vibrant visual experience with original colors. No harmful radiation, no UV or IR. 【Wide Application】Standard MR11 base, easy to install on all MR11 base fixtures. The 3W MR11 LED bulb can be used in track lighting, landscape lighting, recessed lighting, etc.