Hi,

Just picked up an off lease '03 F550 standard cab with a flatbed for my farming operation. Truck is overall in nice shape, but missing some little things. It has a light that's a dome light in the middle, and then two switchable map lights on the sides. Dome light bulb and one of the map light bulbs were missing or burned out. Found the dome light at Autozone, but they didn't have a map light, and Googling is just getting me a bunch of stuff that's not right. Can anyone tell me what number light that's supposed to be, and possibly a source for them. They look like old style buss fuses with pointy ends and the light is in the middle.
Thanks,

Sean

 

They're 578's
Sylvania Long Life 578 LL Mini Bulb, 2 Pack 578 LL: Advance Auto Parts

 

Awesome, thanks! Got some on the way.

 

I was at autozone today and they had these killer LED map lights, they were little square pads about 1.5"X1.5". Super bright and easy to install. They were $10-15 each. I'm thinking I might get 2. My XL trim didn't have any either. And my dome light is very dim.
Can't find them on AZ.com but here is something similar on Amazon,