That figure of 300,000 hours is incorrect.
Lets try 100,000 hrs.
Regardless, that is 100 times what you can expect from an incandescent lamp.
But then again, some people have no concept of colour temperature...the use of cool white CFL's in a living room proves that.
Here's a funny story, I use an old twin 2x 9W PL-S fitting here in my office to give light in here at night instead of using the normal room lights.
Anyway, the current 4000K lamps were starting to get rather blackened and I thought it was time to replace them.
Go down to my local supply house and get what I thought was the correct lamps and bought them home and proceeded to tear the boxes open and fit the lamps.
Switch the fitting on, Good God!, they are the wrong colour (2700K!) and it looks like I have an HPS street-light on in here.
The nieghbours must be thinking I'm growing some drugs in here.
I won't get caught like that again.