In modern stage and architectural lighting design, high-output LED light engines continue to supersede traditional discharge sources. The introduction of the GM-L ALED BSW 480 CMY demonstrates a unified Beam/Spot/Wash optical design tailored for demanding concert touring and theatrical environments.
Engineering Context
Production providers have historically relied on three separate fixture types to deliver narrow mid-air beams, sharp pattern projection, and broad wash coverage. This approach added significant weight to roof trusses, inflated DMX channel counts, and increased power demands. Integrating a custom 450W LED engine producing 100,000 lx at 5 meters resolves this challenge within a single 22.5 kg enclosure.
Optical Versatility: 4° to 50° Zoom Range
The core optical assembly incorporates a motorized multi-element zoom lens system with linear focus calibration from 4 to 50 meters:
- Beam Mode (4°–6°): Produces a dense, parallel column of light with sharp edge definition for mid-air architectural structures.
- Spot Mode (4°–35°): Optimized for crisp gobo projection across focal planes with minimal edge aberration.
- Wash Mode (10°–50°): Engages an independent linear Frost filter to soften beam boundaries for even stage wash.
Subtractive CMY + CTO Color Synthesis
Spectral color control relies on continuous CMY optical flags augmented by a linear CTO temperature conversion filter, adjusting the native 8000K output down to warm tungsten tones. Unlike fixed color wheels, subtractive CMY flags eliminate color stepping during smooth dynamic transitions.
Dual Gobo Projection and Prisms
Graphic shaping utilizes a dual-wheel system comprising 11 static metal gobos and 8 indexable, rotatable glass gobos with 16-bit positioning. Beam splitting is handled by independent 3-facet and 6-facet prisms capable of stacking over projected gobos for multi-dimensional spatial effects.
