Scandvik 360 Degree Nav. Festoon 42mm 175 Lumen Cool White LED Bulb. Multi-Voltage 10 - 30 VDC (works with 12V and 24V). Replacements for popular G4, Bayonet and Festoon bulb base types. High output SMD 5050 LED's (similar or brighter than comparable halogen or incandescent bulbs). 60% more efficient (low amp draw). Low temperature, cool to the touch. Festoon base, 42mm long, 12 Volt and 2.5 Watts.