| BASE STYLE | MEDIUM PREFOCUS |
| BULB STYLE | A (ARBITRARY DESIGNATION) |
| BULB DESIGNATOR | A-21 |
| OVERALL LENGTH | 5.312 INCHES MAXIMUM |
| BULB LIGHT TRANSMISSION CHARACTERISTIC | TRANSPARENT |
| EMITTED LIGHT CHARACTERISTIC | WHITE |
| FILAMENT DESIGNATION | C-8 |
| CURRENT RATING FOR WHICH DESIGNED | 6.600 AMPERES NOMINAL |
| LIGHT OUTPUT RATING | 1020.000 LUMENS NOMINAL SINGLE RATING |
| RATED AVERAGE LIFE | HOURS |
| AVERAGE LIFE RATING IN HOURS | 2000.0 |
| BURNING POSITION | BASE UP |
| FILAMENT HEAVY DUTY SERVICE RATING | NOT RATED |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | WL101 |