337 规格参数
| Bulb Style | t (tubular) |
| Emitted Light Characteristic | colorless |
| Bulb Light Transmission Characteristic | transparent |
| Filament Designation | c-2r |
| Voltage Rating | 6.000 volts nominal |
| Bulb Designator | t-1 3/4 |
| Overall Length | 0.625 inches maximum |
| Burning Position | any acceptable |
| Rated Average Life | hours |
| Light Output Rating | 0.600 spherical candlepower nominal single rating |
| Light Center Length | 0.380 inches nominal |