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

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  • 31mm LED Festoon
  • Perko Eyebrow Fixture uses these bulbs
  • Perko Bulb Selection Guide


These 31mm (1-1/4 inch) LED SMD festoons are perfect for replacing 3-10W incandescent festoons used in many courtesy lights and Perko bow lights. These also work great in the floor level courtesy lights (foot lights) found on the newer boats from Beneteau, and other builders.

The FS-31-04 will also fit in Perko 1100 Fig. 71 Port and Starboard Navigation Lights where the boat has separate red and green fixtures. If you have separate bow 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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3 Reviews

  • 4
    Fit My Perko Light

    Posted by Unknown on 31st May 2018

    Plenty bright and fit my anchor light although the fit was tight.

  • 5
    Perfect fitment for my older boat.

    Posted by raul artiga on 22nd Feb 2017

    What a pleasure to order these. The description, website, photos and superior cust. service and order processing was simple and worry-free. The new bulbs make a huge difference. Pricing was even less than the marine retailers in my area.

  • 5

    Posted by Jim DeVine on 2nd Sep 2016

    They were a snap (literally) to install and are VERY bright!

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