Used ADB ALC4-2 Modular LED RGB+W Lighting Fixture
Used ADB ALC4-2 Modular LED RGB+W Lighting Fixture units offer the light output equivalent of a 1250W tungsten halogen source combined with low power consumption, dynamic colour mixing and flicker-free output suited to broadcast and theatre environments. Available second-hand from professional users worldwide, current listings for this fixture are shown below, so scroll down to find the right unit.
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ADB ALC4-2 Modular LED RGB+W Lighting Fixture specifications
| Brand | ADB |
| Segment | Video |
| Typical used price | €875 (range €875–€875) |
About the ADB ALC4-2 Modular LED RGB+W Lighting Fixture
The ADB ALC4-2 Modular LED RGB+W Lighting Fixture delivers the equivalent output of a 1250W tungsten halogen luminaire while drawing a fraction of the power. Four 50W factory-calibrated LED sources produce full RGB plus white mixing, covering more than one million colours including pure yellow and full amber. A unique mixing chamber ensures perfectly homogenous, shadow-free output, while a closed-loop optical feedback circuit maintains consistent colour and intensity. Seven preset white levels span 2700K to 6500K with stepless DMX control, and the beam angle is adaptable via optional symmetric or asymmetric reflectors or a four-leaf barndoor. Compact and self-contained, it is designed for theatre and TV studio applications.
ADB ALC4-2 Modular LED RGB+W Lighting Fixture — buyer FAQs
What is the ADB ALC4-2 and what is it designed for?
The ADB ALC4-2 is a modular LED RGB+W lighting fixture designed for theatre and TV studio use. It delivers light output equivalent to a 1250W tungsten halogen source while consuming significantly less power. Four 50W factory-calibrated LED sources provide full RGB plus white mixing, and flicker-free output makes it well suited to broadcast environments where stable, consistent light is essential.
Who makes the ALC4-2 and where does it sit in their range?
The ALC4-2 is made by ADB Stagelight, a Belgian company with a long history in theatrical dimming and control. ADB is known for theatre and studio lighting including spotlights, dimmers and control systems, and became part of Clay Paky within the OSRAM group in 2016. The ALC4-2 sits within ADB's LED luminaire offering, targeting professional theatre and broadcast studio applications.
How does the ADB ALC4-2 achieve consistent colour output across multiple units?
The ALC4-2 uses a closed-loop optical feedback circuit within each LED source to maintain consistent colour, white balance and light output over time. A unique mixing chamber produces a homogenous beam with no coloured shadows and no colour separation between sources. Seven factory-calibrated preset white levels between 2700K and 6500K can be selected via DMX, supporting consistent image quality across matched fixtures.
Can the beam angle on the ALC4-2 be changed?
Yes, the ALC4-2 supports selectable beam angles. Users can choose between a symmetric reflector, an asymmetric reflector, or a four-leaf reflective barndoor to adapt the light distribution to the specific application. This makes the fixture flexible across different stage or studio configurations without requiring a separate luminaire.
What should I check when buying a used ADB ALC4-2?
Confirm that the four 50W LED sources are all functioning and that DMX control operates correctly across colour mixing and the white preset levels. Check the reflector or barndoor supplied with the unit, as these are optional accessories and configurations vary. Used units on 10K Used carry a 21-day warranty covering major functional faults; full details are in the buying guide at https://www.10kused.com/used-av-equipment-guide/.
