OSRAM 64317 C 45W-15 45w 6.6A PK30d Airfield Light Bulb The Osram 58910 bulb has PK30D base w/Male Flat Connectors.  Feature:  - T4 Shape - PK30D w/Male Flat Connectors Base - 45 watts  - current controlled 6.6 Amps - Airport applications - NAED 58910