Q:Are the bulbs mercury free?
A:Yes. All LED bulbs are mercury free.

Q:How long does the bulb last?
A:Life hours is 15000 hours.We have had ours for almost two years now and still good.

Q:Will this work in garage during winter months?
A:Yes, LED likes cold. Extreme heats they don't like because they are electronic.

Q:Is there a buzz or any other sound with these?
A:Nope no buzz/sound when bulb is on. Bulb has no wait time to warm up either.

Q:Are these bulbs hot to the touch when turned on?
A:Not at all - no comparison to an incandescent bulb.

Q:Can these fit in Household Lamps Right?
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.

Q:Are these bulbs instant on, or do they have a lag from the time you flip the switch?
A:Yes.They are instant on and are not affected by cold.

Q:Are these led bulbs dimmable?
A:Yes,they are dimmable bulbs.
Q:Are these A21 led bulbs UL certified?
A:Yes,they are UL certified.

Technical Features: Dimmable A21 LED light bulbs 150 watt equivalent, 4000K cool white, 20W, CRI 80, E26 Standard base, turn on instantly. E26 base, length 4.88 inch, width 2.64 inch
Conserve Energy & Long-lasting: Save 86% on energy by replacing 150W with just 20W, average 15,000 hours, up to 13.7 years(3 hours per day)
Dimmable: Seamless dimming capabilities from 10%-100%. Compatible with most dimmers in the market. Ideal for kitchen, living room, bedroom, bathroom and other damp location. Note: Not compatible with smart dimmers, Not compatible with 3-way touch lamp
Eye-care & Eco-friendly: UL Listed! No flicker, no dazzle, no breakable parts, meanwhile very healthy to your eye. No lead or mercury, no IR radiation
What You Get: 2 Years Service! 4 Pack A21 Dimmable LED bulbs 150 watt equivalent
Notice: Not eligible for shipments to California