Well i was searching the EF and the Haynes Manual and couldnt seem to find the replacement bulb sizes for my Ex so I figured I'd maybe help some people out...This is specifically for a 1999 xlt hope it helps...
Low Beam Headlight Bulb Size: 9007
High Beam Headlamp Light Bulb Size: 9007
Parking Light Bulb Size: 3157NALL
Front Turn Signal Light Bulb Size: 3157NALL
Rear Turn Signal Light Bulb Size: 3156LL
Tail Light Bulb Size: 3157LL
Stop Light Bulb Size: 3157LL
High Mount Stop Light Bulb Size: 912
Fog/Driving Light Bulb Size: H1-55W
License Plate Light Bulb Size: 168
Back Up Light Bulb Size: 3156LL
Front Side Marker Light Bulb Size: 916NA
Ash Tray Light Bulb Size: 161
Glove Box Light Bulb Size: 194
Map Light Bulb Size: 168 or 579 or PC579
Dome Light Bulb Size: 906
Step/Courtesy Light Bulb Size: 168 or 912
Trunk/Cargo Area Light Bulb Size: 211-2 or 562
Under Hood Light Bulb Size: 906
Instrument-General Light Bulb Size: 161 or 194
Check Engine Indicator Light Bulb Size: 194
Hi-Beam Indicator Light Bulb Size: 194
Seat Belt Indicator Light Bulb Size: 194
Brake Warning Light Bulb Size: 194
Directional Signal Indicator Light Bulb Size: 194
Low Beam Headlight Bulb Size: 9007
High Beam Headlamp Light Bulb Size: 9007
Parking Light Bulb Size: 3157NALL
Front Turn Signal Light Bulb Size: 3157NALL
Rear Turn Signal Light Bulb Size: 3156LL
Tail Light Bulb Size: 3157LL
Stop Light Bulb Size: 3157LL
High Mount Stop Light Bulb Size: 912
Fog/Driving Light Bulb Size: H1-55W
License Plate Light Bulb Size: 168
Back Up Light Bulb Size: 3156LL
Front Side Marker Light Bulb Size: 916NA
Ash Tray Light Bulb Size: 161
Glove Box Light Bulb Size: 194
Map Light Bulb Size: 168 or 579 or PC579
Dome Light Bulb Size: 906
Step/Courtesy Light Bulb Size: 168 or 912
Trunk/Cargo Area Light Bulb Size: 211-2 or 562
Under Hood Light Bulb Size: 906
Instrument-General Light Bulb Size: 161 or 194
Check Engine Indicator Light Bulb Size: 194
Hi-Beam Indicator Light Bulb Size: 194
Seat Belt Indicator Light Bulb Size: 194
Brake Warning Light Bulb Size: 194
Directional Signal Indicator Light Bulb Size: 194