You likely could use it in a weather-tight outdoor fixture if the fixture could handle the incandescent heat. I am sure it gets too hot and is too fragile to be directly exposed to rain in the standard eave fixture.
E27, medium base.
We've had them in our bathroom since last September, no problem they are great!
Yes, it can be used in an enclosed fixture.
This is a clear bulb for regular household current.
I have these bulbs in two table lamps. I don’t think they get as hot as a halogen bulb would get. They do get hot like a normal incandescent bulb.
This can be used in that manner.
These bulbs will likely work but they may interfere with the operation of the garage door opener by the remote. If you consult Chamberlain/Liftmaster/Craftsman's or another manufacturer's website, you will find a list of LED bulbs tested and approved by the manufacturer.
It appears as though they can, according to the description.