Thought I'd pass this along, too.........
When replacing heater control bulbs, instead of pulling the heater controls out, pull the radio and go in from the radio opening. The bottom screws for the hearer controls are tough to get past the dash (you'd have to see it to believe what Ford did, or at least on my truck). The screws are partially blocked by the dash, you have to pull the dash down to get the screws out. I should have pulled the radio instead.
Thought this would save someone some aggrivation.
By the way the stock lamps are Toshiba. I replaced them with Sylvania (much better, I think).

 

they are a bit of a pain but not too hard, just annoying not being able to put a socket on them.