ETC Source Four 575W Ellipsoidal Lighting Fixture

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There's only one Source Four - the fixture that changed the lighting industry. Source Four combines the energy-saving power of the patented HPL lamp, with a dichroic reflector and optical-quality lenses, for the coolest beam on the market. That means your gels, patterns and shutters last longer and your performance space stays cooler.

No other light offers such optical brilliance. Source Four's revolutionary technology gives you a clean white beam for unequaled imaging, crisp pattern projection, and a bright, even field. The EDLT lens tube option for 19º, 26º, 36º and 50º field angles makes the Source Four even better for ultra-crisp, high-contrast gobo projections.

Rated for up to 750 watts, the Source Four is perfect for punching through saturated colors and performing the longest throws. Ultra-efficient for more lumens per watt: at 575 watts the Source Four literally outshines 1000W ellipsoidals. And at 750 watts, well, no point comparing - there are no other fixtures in its class.


  • 5º, 10º, 14º, 19º, 26º, 36º, 50º, 70º and 90º field angles

  • Rated up to 750W

  • Super-efficient HPL lamp

  • Faceted dichroic reflector removes 90% of IR heat from beam

  • Interchangeable lens tubes

  • Rotating barrel ± 25º

  • Three-plane stainless-steel shutter blade assembly

  • Tool-free lamp adjustment

  • Insulated rear handle

  • Rugged die-cast aluminum construction

  • Supports Dimmer Doubling™ (North America only)


Brand ETC
Model Source Four® 19


Type Ellipsoidal
Color Black


Lens High contrast aspheric lens. Faceted borosilicate reflector with dichroic cold mirror coating removes greater than 90% infrared radiation (heat) and reflects greater than 95% of visible light. Lens(es) secured with anti-vibration shock mounts. Beam edge continually adjustable hard-to-soft. Interchangeable lens barrels permit selection of 5˚, 10˚, 14°,19˚, 26˚, 36˚, 50˚, 70° and 90° field angles as well as 19˚, 26˚,
36˚, and 50˚ EDLT lenses.
Lamp 750W maximum. HpL – compact tungsten filament contained in a kryptonfilled quartz envelope (see table for suitable lamp types). Patented filament geometry makes for extremely efficient light collection and transmission. Integral die cast aluminum heat sink lamp base.

Physical Information

Power 115-240V, 50/60Hz. High temperature 3–conductor 36” leads in a glass fiber outer sleeve. Supports ETC Dimmer Doubling™
Dimensions (WHD) 13.3 x 21.3 x 22.8 inches
Weight 14 lbs
Mounting Standard C-Clamp
Yoke Steel yoke with two mounting positions
Construction Die cast aluminum construction, 20 gauge stainless steel shutters