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Lexel DLM

RGBW LED LampLexel LED DLM system is designed for general lighting applications in the professional market for retail, hospitality and offices, enabling the creation of various atmospheres with changing tones of white light and different colors from a single light source. Lexel LED DLM uses a combination of RGBW LEDs to produce high CRI white light.

Lexel LED DLM is a system with an architecture based on two modules communicating through a proprietary lighting protocol (T-Bus):

  • External Protocol Translator (accepts DMX or DALI) and Power Supply
  • Light Generation Module (light engine)


  • Retail outlets – windows, wall washers, leisure areas, focus islands and retail concept stores
  • Office areas – public spaces like presentation rooms, boardrooms and canteens/restaurants
  • Hospitality – lobbies, reception areas, restaurants, bars and elevator halls
  • Recreation – museums, galleries, theaters and other places of interest

Contributions to the product:

Conceptualization and ResearchSoftware Development Process
Dynamic light generation control
Light measurement and signal timing
Thermal management algorithm
Power management algorithm
Overall firmware development process
Internal coding standards
Development tools selection
Version control system
Bug tracking system
Written Specifications and ProceduresEmbedded Software Architecture and Design
Hardware requirements and system I/O mapping
Functional specification
Simulation/emulation environment specification
T-Bus internal lighting protocol specification
Simulation/emulation design
Overall firmware architecture
Firmware design documents
Code DevelopmentTesting & Debugging
Board start-up and boot-loader
Device drivers
Non-volatile memory management
Real-time framework
Color feedback loop
T-Bus protocol stack
DALI protocol stack
DMX/RDM protocol stack
Firmware debug support
Exception/error handler
Performance analysis tools
Diagnostic tools for R&D
Technical leadershipIntellectual Property
Training and mentorship for the team
Design authority and knowledge sharing
International patent application: WO2008/070981A1 (PCT/CA2007/002229)
Authors: Shane Robinson, Bojana Bjeljac, Duncan Smith, Stefan Poli