Not in the least. These are quiet to the point that I cannot hear anything coming from them at all.
I have installed these in nearly every light fixture in my house and have not noticed any flickering. I don't have any installed in dimmable applications. There is a very noticeable difference between Soft White bulbs and Daylight bulbs.
Home Depot. Price varies. There are some good rebates that bring a 4-pack down to under $5.
LED bulbs do produce heat. They also are basically electronic devices, therefore heat can damage them. With this in mind manufactures have created heat sinks - materials placed to draw the heat away from the sensitive components. The heat sink is the base portion and will feel hot during operation.
Yes they can. I have quite a few that are upside down and sideways. They work great!
The three way LED will get close but the single intensity LED's are not quite there yet . You can get a 150 equivalent in a CFL (fluorescent) but they are BIG.
did work well with my dimmer switch
The Cree "30/60/100W Equivalent Soft White (2700K) A21 3-Way LED Light Bulb" is what you need Home Depot item number 1001881200 Here is a direct link. http://www.homedepot.com/p/Cree-30-60-100W-Equivalent-Soft-White-2700K-A21-3-Way-LED-Light-Bulb-SA21-16027MDFD-12WE26-1-11/207169064
My dimmer switches have an adjustment lever to control the lowest dimming setting, and it is hidden under the switch plate. My specific dimmer suggested to set it such that the bulbs do stay on faintly, "as low as possible with all bulbs on & not flickering," and to use the off switch to turn them off. If you have an older dimmer that turns off by turning to the lowest setting you may want to check if it is LED compatible. You might burn your bulbs out faster than you like if it is an incandescent dimmer. Hope this helps.
Cree has one "30/60/100W Equivalent Soft White (2700K) A21 3-Way LED Light Bulb" Home Depot part number 1001881200 Here is a direct link. http://www.homedepot.com/p/Cree-30-60-100W-Equivalent-Soft-White-2700K-A21-3-Way-LED-Light-Bulb-SA21-16027MDFD-12WE26-1-11/207169064?keyword=1001881200