Rayhoo 10pcs G4 Base 48 LED Light Lamp 3 Watt DC 12V White Bulb Undimmable Equivalent to 20W T3 Halogen Track Bulb Replacement 360&deg; Beam Angle(Only DC 12V) Save electricity bill: Replace 20W halogen bulb by 3W LED, save 85% on electricity bill of lighting Light angle: 360 Directional; 48 LEDs, DC 12V. Easy Installation:Standard G4 base,can be easily fitted instead of ordinary halogen bulbs. Reduce re-lamp frequency:Lifespan is over 20000 hrs,save effort and maintenance costs on changing bulbs frequently. Eco-Friendly:No lead or mercury; No UV or IR Radiation. Note:Only suitable with DC 12V power supply, Please use a LED transformer(which wattage is matched with the LED bulb),Not halogen transformer . Use halogen lamp transformer will cause the light bulb flashing even burning seriously.