Q: How many hours can it be lasting ? <br>A: Average 15,000 hours, up to 13.7 years. <br><br>Q: Do they flash or buzz? <br>A: No, they're no flicker, silence and eyes caring. <br><br>Q: What's the light color? <br>A: The lights are 3000K warm white, 8.5W, light bulbs 60 watt, 750lm. <br><br>Q: Can these be used in outdoor covered fixtures?<br>A: Yes.<br><br>Q: Are these bulbs good for enclosable fixtures? <br>A: Yes, they are MUCH cooler than standard incandescent bulbs. <br><br>Q: Is this bulb instant on?<br>A: Yes, no warm up time and right back on if you turn it off and need it back on quickly.<br><br>Q: Is this the standard base for an ordinary table lamp?<br>A: Yes, it will fit E26 (the standard US lamp socket) and E27 (EUR) sockets. A19 is a bulb shape and not a socket spec. <br><br>Q:If I received broken bulbs what should I do? <br>A:Please feel free to contact us asap, our service center will reply within 24 hours to solve your problems.