MHL-B is the only high-intensity light in the World with a certification from a third-party laboratory. Possible to remotely monitor each light head and track over web, distinguish MHL-A from the other brands.MHL-B with 360 degree body high-intensity obstruction lights are designed to mark very tall constructions such as broadcast masts, towers, buildings, cranes, and chimneys. Obelux high-intensity100 000 cd light head needs to have an external controller (LHC)