Unique heat-dissipating design to ensure the high heat-dissipating performance and long lifespan on the bases of 3 hours/day. Reduce your energy usage and save on your electricity bill when you use 4W LED Spotlight Bulbs as replacements. Low heat generation, no heat damage to achieve ideal display lighting. High brightness,low power consumption, energy-saving and environmentally friendly. Our led light bulbs are brighter and safer: illuminate your space , and rest assured knowing our LED bulbs are shatterproof and contain no mercury. Easy to install without transformer. These bulbs are perfect for living, dining, bedroom and kitchen.