Product review (4 stars): Nothing More Than a 10W "Night Light" Bulb
This bulb does work fine, but upon receiving it and comparing it to a standard 4W night light bulb, I could not detect a single difference in the construction (internal, or external).

I assumed a bulb designed to operate in a vibrating dryer would have some "heavy duty" aspects.  Not the case.  This is an ordinary 10W night light bulb.  Google "10W night light bulb" to see them available for pennies each.

Live and learn...