Fulleon Souder Beacon with Roshni low profile and flash lighting. The RoLP LX wall is ideal for dual use applications where a visual alarm device is required in addition to an audible alarm. Based on the popular Roshni product platform, the RoLP LX is a reliable, high performing VAD (visual alarm device) that is certified to EN 54-23 standards. It is recommended for wall use and requiring just one installation point, the RoLP LX wall is also available as a base only for use with any standard RoLP sounder, including the high output RoLP Maxi sounder.