Aviation obstruction lights are classified by intensity and flashing pattern. This guide covers low-intensity Type A/B/C, medium-intensity Type A/B/C, and high-intensity Type A/B lights and their typical applications.
Low-Intensity Obstruction Lights
Low-intensity lights are used for obstacles that do not pose a significant hazard to aviation. They are typically red steady-burning lights used on buildings, towers, and other structures.
- Type A: Red steady-burning, 10 cd
- Type B: Red steady-burning, 32 cd
- Type C: Red steady-burning, 200 cd
Medium-Intensity Obstruction Lights
Medium-intensity lights provide greater visibility for taller structures. They can be either red steady-burning or white flashing lights.
High-Intensity Obstruction Lights
High-intensity lights are used for very tall structures such as skyscrapers and transmission towers. They are white flashing lights with high intensity.