| BASE STYLE | TELEPHONE SLIDE NUMBER THREE |
| BULB STYLE | T (TUBULAR) |
| BULB DESIGNATOR | T-2 |
| OVERALL LENGTH | 1.688 INCHES MAXIMUM |
| BULB LIGHT TRANSMISSION CHARACTERISTIC | TRANSPARENT |
| EMITTED LIGHT CHARACTERISTIC | COLORLESS |
| FILAMENT DESIGNATION | C-7A |
| WATTAGE RATING | 4.800 WATTS |
| VOLTAGE RATING | 48.000 VOLTS NOMINAL |
| CURRENT RATING FOR WHICH DESIGNED | 0.100 AMPERES NOMINAL |
| LIGHT OUTPUT RATING | 2200.000 FOOTCANDLES NOMINAL SINGLE RATING |
| RATED AVERAGE LIFE | HOURS |
| AVERAGE LIFE RATING IN HOURS | 5000.0 |
| BURNING POSITION | ANY ACCEPTABLE |
| FILAMENT HEAVY DUTY SERVICE RATING | NOT RATED |
| SPECIFICATION/STANDARD DATA | 08108-48B3 MANUFACTURERS STANDARD |