Usage Tips:Features: SAVING MONEY: Lower Consumption and Higher Brightness, 3W or 5W LED replace 30W-50W Halogen Spotlight Bulb, save up to 90 percent on the electricity bill. WIDE VOLTAGE: AD or DC 12V-24V working voltage, easy to install and widely applied. EASY TO INSTALL: Standard GU4.0 Base, Plug Play, Warm White, Natural White, and Cool White, the light diffuses to a larger area and is brighter, to create a cozy and luminous environment. LONG LIFETIME: With a lifetime of up to 30000 hours, you can reduce the hassle of frequently replacing your light bulbs. lower heat, safer than Incandescent bulbs. WIDE RANGE OF USE: For Landscape Lighting, range hood, Display Cases, Recessed Lighting, Hospitality Lighting, Residential Lighting, etc. If your working voltage is 100-240V, a transformer for 12V is needed. We recommend using a led transformer or keeping 1 or 2 halogen lamps to meet the Minimum power of a traditional transformer. Specifications: Base: MR11 or GU4, Power: 3W or 5W Color temperature: Warm White:3000K, Natural White:4000-4500K,Cool White:6000K Dimensions: Dia 1.38 inch x L1.38 inch or Dia35 mm x L35 mm Input voltage: AC or DC10-30V Lumens: 3W:300LM, 5W:500LM LED Quantity: 3W:12pcs, 5W:18pcs CRI (Ra): > 80 Beam angle: 120 degrees Package Included: 10 x MR11 LED Bulbs