NSN: 6240-01-344-4778

Technical Characteristics

• Filament Heavy Duty Service Rating

  not rated

• Wattage Rating

  90.000 watts

• Average Life Rating In Hours

  8000.0

• Emitted Light Characteristic

  colorless

• Light Center Length

  2.438 inches nominal

• Bulb Style

  a (arbitrary designation)

• Light Output Rating

  1040.000 lumens nominal single rating

• Burning Position

  any acceptable

• Base Style

  medium screw

• Overall Length

  4.375 inches nominal

• Criticality Code Justification

  feat

• Rated Average Life

  hours

• Filament Designation

  c-11v

• Bulb Light Transmission Characteristic

  transparent

• Voltage Rating

  125.000 volts minimum and 130.000 volts maximum

• Current Rating For Which Designed

  0.692 amperes minimum and 0.720 amperes maximum

• Bulb Designator

  a-21

• Special Features

  watt-miser; traffic signal; burn bdth