Aircraft miniature incandescent bulb specification:
Base Type: Single Contact Bayonet (BA15s)
Voltage: 28V
Watts: 5W / 10W / 15W
Average Life: 300 hrs
Initial Lumens:20lm / 70lm / 140lm
Dimension: 18x37mm
Primary application: Aircraft COCKPIT & WING/TAIL LIGHTS