Where are popular single's bars?

Yellow lights have become popular in the civilian arena as a way of drawing attention to a vehicle involved in non-emergency work. Most phone and cable companies, towing services, and certain types of construction equipment mount some type of lightbar; additionally, several local and state vehicles involved in maintenance work for roads, gas and water pipes, electric services, and so forth utilize yellow lights for a higher degree of visibility. Typically these lights are the single beacon kind, although lightbars have been used for vehicles of this type, especially on wreckers/tow trucks.