• $300.00
    Unit price per 
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The EDLT attaches easily to any new or existing fixed-focus Source Four ellipsoidal spotlight. While increasing light output up to 10%, EDLT also provides heightened sharpness and stunning contrast to images when the Source Four is used as a pattern projector.

ETC lens tubes ship with the color frame and focus knob. 

What is Source Four EDLT?
EDLT stands for “Enhanced Definition Lens Tube”. The EDLT offers heightened contrast and edge crispness to projected images, specifically when the Source Four is used as a gobo projector. This is an optional lens tube for the Source Four, it is not the entire fixture.

What’s so innovative about the EDLT?
The EDLT’s new dual aspheric lenses utilize the most advanced manufacturing techniques and anti-reflective coatings. The system is optimized for sharp focus of intricate gobos with maximum lumen output.

Why is the EDLT an option rather than standard on all Source Fours?
EDLT’s advanced optical system costs more to produce and is not required for most lighting applications. But when the lighting situation calls for even more precise projection optics, EDLT is available! Remember, millions of Source Four products are in the field and remain the benchmark for luminaires, still setting the standard for performance and price.

Is there any loss of light output associated with the EDLT?
No, in fact, photometric tests show that the EDLT produces a gain in field lumens, along with improvements to contrast and acuity.

• The perfect option for any Source Four Ellipsoidal
• Makes the Source Four better than itself!
• Ideal for corporate logo projections
• Perfect for crisp projections on scenic elements
• Remarkable edge acuity
• Stunning contrast
• Available in 19°, 26°, 36° and 50° field angles


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