LP-810/S Low-intensity Type A Solar Powered Aviation Obstruction Light has been installed sucessfully in -40°C in Russia and work well.As usual,most of common Solar Aviation Obstruction Light will not work in-40°C weather, because battery,LED,PCBA will not be function.My side has use super-low temperature battery,Big power LED and military level parts for PCBA for new LP-810/S Low-intensity Type A Solar Powered Aviation Obstruction Light.That is filled a gap in the market in -40°C weather for Aircraft warning light.