LUX BS209 灯, SBC BA15D 12V 5W
The is an Incandescent Lamp with standard bayonet cap. It has stem type filament structure glass extended support gives much higher resistance to vibration. Very importantly, the bulbs are gas filled as opposed to vacuum exhausted giving longer life. Combine these two improved manufacturing features together and you have a lamp that will give longer life and better service. This lamp is used for sail and tail illumination.