The 15 Pcs Replacement Bulbs AC E10 10V-55V 0.2W 2200K Warmwhite for String Lights by MeetUs are energy-efficient LED bulbs designed for indoor use. These candle-shaped bulbs emit a warm white light with a brightness of 100 lumens each, making them perfect for creating a cozy ambiance in any room. With a low power consumption of 0.2 watts and a long average life of 50,000 hours, these bulbs offer both practicality and durability. These E10 bulbs come in a pack of 15, ensuring you have plenty on hand for any lighting needs.