OL370w Medium Intensity White Obstruction Light

The OL370w is an FAA L-865 white medium intensity obstruction lighting system for FAA D-type towers. The system is housed in a single enclosure with a low voltage environment, removing the need for an interlock switch—alarms can remain active, even while the door is open. Firmware upgrades are quick and easy, requiring no controller modifications.


  • Fully compliant with:
    • FAA L-865 medium-intensity white flashing obstruction light configurable to meet both AC 70/7460-1K and 1L
    • ICAO 6th edition standards for medium-intensity type A obstacle lights
    • CAR 621 2nd edition for medium-intensity CL-865 flashing lights
  • Single enclosure and cable system makes setup easy
  • Flexible status monitoring thanks to LTE data connectivity
  • Robust, low-maintenance design
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Models and Options

Lightning Protection
With a surge suppression rating of 25kA, the OL370w offers protection against 99% of lightning strikes. With a properly grounded tower, even an intense lightning strike of 200kA will only deliver 22.5kA to the flashhead cable, still lower than the OL370w's 25kA rating.
Data Connectivity
The OL370w has reliable remote monitoring capabilities through AT&T, Verizon LTE, and others. Customize your monitoring to your needs.
Easy Installation
The OL370w is lightweight and versatile, coming with two lockable twist knobs for easier access, a water channel to prevent water from getting in the door, and knock-out holes at the bottom of the enclosure for simplified cable installation.

OL370w: Get A Quote

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When you decide to use our obstruction lights, our team is here to help. We offer free site assessments to determine the products you need for your project and location. You’ll get a free Energy Balance Report™ and lighting layout. Get more details and sign up now—it’s free!

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Light Specifications and Documents

  • Input Voltage:
    • 120-240 VAC at 50/60 Hz
    • ±24 VDC (optional)
    • ±48 VDC (optional)
  • Frequency: 50-60 Hz
Click Here To See All Specs
Input Voltage
120-240 VAC at 50/60 Hz
±24 VDC (optional)
±48 VDC (optional)
50-60 Hz
FH Dimensions15.75″ dia. x 7.31″
400.0 mm dia. x 180.57 mm
FH Weight26.3 lbs (11.93 kg)
FH Aerodynamic Wind Area99.125 in2 (63,900.51 mm2)
Controller Dimensions23″ x 17.13″ x 6.44″
Controller Weight44 lbs (20 kg)
Protection RatingIP65, NEMA 4X


Power Consumption (with IR)Flash Rate (per min)Flash Intensity
Day (white)
80W (70W)40 flashes20,000 ± 25% ECD
Night (white)40W (40W)40 flashes2,000 ± 25% ECD
Day (white)
110W (100W)60 flashes20,000 ± 25% ECD
Night (white)50W (50W)60 flashes2,000 ± 25% ECD

Light Compliance and Certifications

Our solar- and AC/DC-powered obstruction lighting systems are designed to meet your relevant federal aviation regulations. Our thorough product testing and Intertek certifications ensure your light will meet your requirements over the long term. Want proof? See our certificates below. If you have any questions about specific lighting requirements relating to your project, please contact us.

FAA Compliance
CAR Compliance
DGAC Compliance