The ETC Source 4WRD is an innovative LED retrofit engine designed to convert a traditional tungsten-halogen ETC Source Four ellipsoidal reflector spotlight (Leko) into a modern, energy-efficient LED fixture. This drop-in module replaces the original lamp, reflector, and socket assembly, allowing theaters, churches, schools, and studios to upgrade their existing inventory of Source Four fixtures without the cost of purchasing entirely new luminaires. The result is a drastic reduction in power consumption, minimal heat output, and the elimination of routine lamp purchases, while maintaining the superior optical performance and field quality the Source Four is known for.

Once installed, the 4WRD provides a consistent, flicker-free light source with a high Color Rendering Index (CRI), making it suitable for television and critical theatrical applications where color quality is paramount. It offers a range of fixed or variable color temperature options and maintains the fixture's full range of focus, shutter, and pattern projection capabilities. The conversion significantly reduces maintenance demands, as the LED engine boasts a long lifespan of tens of thousands of hours compared to the few hundred hours of a traditional lamp.

The retrofit process is straightforward, preserving the original housing, lens tube, and controls of the Source Four. This makes the 4WRD a cost-effective and sustainable upgrade path. By leveraging existing hardware, users gain the benefits of LED technology—including silent operation, instant on/off, and reduced HVAC load—while extending the useful life of their trusted lighting instruments and achieving substantial operational savings.