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4-LED, 31mm(1-1/4") Festoon Bulb (FS-31-04)

(7 reviews) Write a Review
  • 31mm LED Festoon
  • Perko Eyebrow Fixture uses these bulbs
  • Perko Bulb Selection Guide


31mm (1-1/4 inch) LED SV8.5 Festoon - perfect for replacing incandescent festoons up to 10W used in many courtesy lights and Perko fixtures. Replaces foot lights found on newer boats from Beneteau and other builders.

Fits Perko 1100 Fig. 71 Port and Starboard Navigation Lights where the boat has separate red and green fixtures (choose red and green bulbs respectively to achieve near-perfect transmittance).

For other Perko navigation and anchor lamps, see our new Perko 31mm replacements or see our Perko Selection Guide.

Warm White, Cool White, Red and Green colors available.

  • Input Voltage:10VDC - 30VDC Constant Current
  • Wattage: 1W
  • Amperage: 0.080A
  • Lumens: 80 CW, 65 WW
  • Color Temp: 3100k WW
  • Beam Angle; 120°(FWHM)
  • Dimensions: 31mm x 17mm x 10mm

Fitment: Fits 31mm (1-1/4") Dome Lights and Courtesy Lights Replaces bulb types: 3021 3022 3175 6428 6430 30922 DE3425 Marinebeam bulbs feature a proprietary Constant-Current driver and high-output thermally-efficient multi-emitter SMD LED bonded to an Alumicore engineered thermal substrate. All our bulbs can operate on either polarity, and have a custom EMI suppression circuit to prevent interference with radios, GPS, etc. These features combine to give record setting output, superior efficacy (lumens/watt), and the longest service life possible in an LED cluster.

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7 Reviews

  • 5
    31mm festoon bulb

    Posted by Rarebear on 3rd Sep 2019

    excellent brilliance and quality. Not junk like most bulbs from other suppliers. would buy again

  • 5
    Works in an early VW Vanagon

    Posted by BillA on 7th Aug 2019

    Used this as a replacement for the map light.
    Nice warm color

  • 5
    Great upgrade for 30 year old Perko fixtures

    Posted by Matt on 25th Apr 2019

    Purchased for my 1984 Wavelength 24. Warm white doesn’t overpower the red and green tint on the bow bulbs. Easy install and no polarity concerns.

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