• Yoke-mounted 100V to 277V auto-ranging electronic ballast. 
  • Ships with 150W ceramic metal-halide lamp. 
  • 12,000 hr lamp life at 3000º K color temperature. 
  • Multi-faceted glass reflector. 
  • Positive zoom lock. 
  • Field angle and focus scale markings. 
  • Rotating barrel ± 25º. 
  • Three-plane stainless-steel shutter blade assembly. 
  • Easy access lens cleaning. 
  • Insulated rear handle. 
  • Rugged die-cast and extruded aluminum construction.





  • ETC Source Four Zoom Profile Spotlight, zoom ranges 15°-30° and 25°-50°. With Source Four Zoom you need only one fixture for a variety of beam angles. Plus, ETC's patented one-handed zoom operation makes adjustments quick, simple, and safe. Technicians can focus with one hand and hold the ladder with the other. And the lens-tube door provides quick and easy access when the lens assembly needs cleaning (tool-free). But the best part is that Source Four Zoom has all the advantages of the revolutionary fixed-focus Source Four: bright, even field, cool beam, and amazing efficiency. The patented dichroic mirror means shutters and accessories stay cool, and drop-in accessories are interchangeable with fixed-focus Source Fours. Rated up to 750 watts, Source Four Zoom provides Source Four's crisp optics for excellent imaging and field quality.