PAR38 MALSR stands for “Medium Intensity Approach Light System with Runway Alignment Indicator Lights”. This product is an aviation field aid used to provide guidance and indication during aircraft landings. It typically consists of a series of lights installed on both sides of the runway to display the approach path and indicate the aircraft’s horizontal alignment. The PAR38 refers to the size and shape of the bulb, which is commonly one of the specifications for outdoor lighting PAR bulbs. These bulbs typically utilize refraction or projection to provide specific beam angles and illumination effects.