Title Image

Flash Products

Vanguard® Medium FTS 370d Lighting System for MET Mast Towers

Dual FAA L-864 / L-865 Wind Farm Lights

The Vanguard Medium FTS 370d is a dual (white, red and infrared) FAA L-864/L-865 LED aviation obstruction lighting system. It is suitable for towers between 200′ and 700′ AGL (FAA E-type towers) including meteorological (or MET mast) towers. The FTS 370d uses a single cable for both power and communication.


Standard Features

  • Aircraft Detection Lighting Systems (ADLS) interface
  • Infrared (IR) LEDs on the flashhead for compatibility with NVG and NVIS per FAA AC 150/5345-43J
  • Patented Fresnel optics to minimize ground scatter
  • Interleaved LEDs and by-pass circuitry for longer life
  • Surge immunity of 25kA to withstand 99% of all lighting strikes
  • Powder-coated aluminum top plate, base and controller box to prevent corrosion or damage from flying debris like ice
  • 4-line OLED backlit on-board user interface for diagnostics and programming
  • Photodiode uses ruggedized metal housing and is equipped with shielded cable to prevent EMI interference and crosstalk
  • Input power breaker switch eliminates replaceable fuses
  • Automatic failsafe switches to day mode if no mode change detected
  • 6 dry contacts for monitoring
  • 5-year parts warranty


System Options

  • SMART Card
    • Monitor and control the system remotely
    • Receive full diagnostic information through LTE modem or ethernet-based connectivity via SNMP or Modbus protocols
    • Upgrade firmware remotely
  • Outdoor Wi-Fi antenna for onsite diagnostics, programming and lighting inspections
  • GPS synchronization


Regulatory Compliance

  • FAA L-864/L-865 under AC 70/7460-1L
  • ICAO Medium Intensity types A and B
  • CAR 621 CL-864/CL-865
  • DGAC L-864/L-865
  • CSA
  • CE



  • 5-year parts warranty

Please fill out the form below or call 615.503.2000 with questions or to order this product.

  • Drop files here or
    Accepted file types: jpg, png, pdf, Max. file size: 100 MB.

    Input Voltage

    100-240 VAC
    ± 48 VDC (optional)


    50-60 Hz

    Marker Power Consumption

    2.1 watt per marker*
    3.4 watts per marker with IR

    Marker Dimensions

    9” x 2.75” x 2.13” (228.6 x 69.9 x 54.1 mm)

    Marker Weight

    1.6 lbs. (0.7 kg)

    FH Dimensions

    15.75″ dia. x 7.31″ height

    FH Weight

    26.3 lbs (11.92 kg)

    FH Aerodynamic Wind Area

    99.125 in2

    Controller Dimensions

    23″ x 17.13″ x 6.44″

    Controller Weight

    44 lbs. (20 kg)

    Protection Rating

    IP65, NEMA 4x

    * Not included in system consumption


    White Day

    80 watts (70 watts with IR)
    40 fpm
    20,000 ± 25% ECD

    Red Night**

    40 watts (40 watts with IR)
    20/30/40 fpm
    2,000 ± 25% ECD

    White Night

    40 watts (40 watts with IR)
    40 fpm
    2,000 ± 25% ECD

    ** Only 30 fpm flash rate is applicable for FAA certified applications filed under AC 70/7460-1L, and requires the use of L-810(F) depending on the height of the structure


    White Day

    110 watts (100 watts with IR)
    60 fpm
    20,000 ± 25% ECD

    Red Night

    50 watts (50 watts with IR)
    60 fpm
    2,000 ± 25% ECD

    White Night

    50 watts (50 watts with IR)
    60 fpm
    2,000 ± 25% ECD