MSM obstruction lights include the three categories defined by the International Civil Aviation Organization : low intensity (neon cold discharge and led obstruction lighting), medium and high intensity (xenon flashing lamps) beacon lights.
Obstruction lights for navigation
Lamps with cold neon discharge do have an extremely long lifespan, and a very high reliability in constraining environments like high temperature and electromagnetic fields. Cold neon discharge lights are red fixed obstruction lights low intensity. Cold neon discharge obstruction lightings are used for buildings, chimneys, airports, pylons, GSM towers, radio towers, TV towers. LED obstruction lightings are used to mark wind mast, meteo mast, windmills, windfarms.
Low intensity type A &B
Luminous Diode Beacon (LEDs)
Cold cathode neon beacon, low-power focused optics
Medium intensity type A
White flashing beacon operating day and night, or only day
Medium intensity type B
Night-only red flashing beacon
Medium bi-color intensity type A B
White flashing beacon by day and red at night
High intensity type A
White flashing beacon day and night