Back in the day I remember having to choose if you wanted a Beamer or Fanstar style unit if you wanted these style units. The Beamer / Derby / Avenger were the dual rotating bulbs and the Fanstar / Sunray / Flat Beam used the linear stick bulbs. Each unit was around $500.00 - $600.00 in the early 90's. This unit combined the best of both worlds. This fixture has the linear 500 watt, 120 volt FCL bulb and the 2 - 120 volt, 300 watt 64515 bulbs mounted on the same rotator. You can choose from either effect or both at the same time from the remote controller unit. Great idea and unit puts on a great show!! Light made here in the US!
Video of the NESS Derbystar Lighting Unit