Q:Are the bulbs mercury free?<br> A:Yes. All LED bulbs are mercury free.<br><br> Q:How long does the bulb last?<br> A:Life hours is 15000 hours.We have had ours for almost two years now and still good.<br><br> Q:Will this work in garage during winter months?<br> A:Yes, LED likes cold. Extreme heats they don't like because they are electronic.<br><br> Q:Is there a buzz or any other sound with these?<br> A:Nope no buzz/sound when bulb is on. Bulb has no wait time to warm up either.<br><br> Q:Are these bulbs hot to the touch when turned on?<br> A:Not at all - no comparison to an incandescent bulb.<br><br> Q:Can these fit in Household Lamps Right?<br> A:Yes.They are standard shaped bulbs, (A21), with a medium, E26 base, (screw diameter and threads). They are made to fit just like a standard incandescent bulb.<br><br> Q:Are these bulbs instant on, or do they have a lag from the time you flip the switch?<br> A:Yes.They are instant on and are not affected by cold.<br><br>Q:Are these led bulbs non-dimmable?<br> A:Yes,they are non dimmable bulbs.<br> Q:Are these A21 led bulbs UL certified?<br> A:Yes,they are UL certified.<br>