The Skyline Alpha series is based on a rubber base with a transparent or red plastic cap. The six diode strips each with eight horizontally alligned LEDs exceed the minimum requirements of the ICAO of 10 cd explicit without dazzling. The Skyline Alpha 1 is the standard version without additional fastening material and can be mounted on stationary surfaces. Alpha 2 is pre-mounted on a mounting bracket and equipped with a 1 meter cable. Alpha 3 is basically the same as Alpha 2 except that it comes with a connecting box for simple economic installation. For operation on masts, or at places where double safety is required, the Alpha 4 is recommended. This obstacle light has two lamps mounted on a double arm and is easy to install by means of the connecting box. All configurations are available with a red or transparent cap with red LEDs.