In all lighting sectors, warranty and customisation are becoming key product differentiators. In addition to that, the integration of more electronics and sensors in lighting systems will change what we call lighting today. While the concepts of digitalisation and Industry 4.0 are progressing fast into the manufacturing world, in the lighting industry, the front-end product design is still using traditional simulation techniques. An innovative approach is to couple digital twins with Artificial Intelligence to offer unlimited possibilities to the “first build and then tweak” approach. The main goal of AI-TWILIGHT is to merge the virtual and physical worlds to pave the way for innovations in fields where the European lighting industry is likely to be competitive. Self-leaning digital twins of lighting systems (LED source, driver of a lighting application) will be created and used as input for predicting performance and lifetime of product and infrastructure design and management in an autonomous world. Tests will be carried out in selected application domains e.g. automotive, horticulture, general and street lighting. The key technical and exploitation objectives of the AI-TWILIGHT consortium are: • To create and digital twins of LED light-sources and electronics (driver) • To create self-learning models using AI and analytics techniques • To facilitate the implementation of the digital twins in digitalized design flow (for SSL product design) and facilitate their applications upstream, up to digital twins of lighting systems of large infrastructures (e.g. for building design). • To implement the AI-TWILIGHT methods, models and tools within consortium partners to harvest its benefits When translated to business goals, objectives will result in the introduction of more customised and connected products by 20% while reducing the time to market by 30%, and reducing by 25% the total cost of ownership of a “AI-TWILIGHT powered system.

The European lighting industry aims at reducing cost, at continuously improving product performance while reducing time to market and enlarging the product. The main challenge for the design in of LED components into lighting systems is the temperature and current dependence of their performance. In order to achieve a good design of LED systems, a modular, multi-physics based modelling approach is needed – this way allowing the freedom for LED component integrators to use such models in any kind of luminaire designs. In order to overcome those key challenges, seamless integration of the LED in the product development chain is necessary. For that a bridge, in the form of standardization, has to be established between the semiconductor industry and the LED component integrators. In order to achieve this, the following tools have to be provided: • Generic, multi-domain model of LED chips • Compact thermal model of the LED chips’ environment • Modeling interface towards the luminaire The goal of the project is to develop a standardized method to create multi-domain LED compact models from testing data. The objectives are: • Define set of LED model equations that can be implemented into a FEM/CFD tool, for the purpose of self-consistent multi-domain simulation of LEDs thermal, electrical and light output characteristics. • Provide interfacing between measurement tools, modelling tools and simulation tools to allow the application of the compact LED models. • Prove the benefits of the use of compact models in the development process to reduce development times and cost. This will lead to an industry standard in the lighting industry. Achievement of this project is expected to boost time to market of LED products cut by 1/3, cut development cost by 50%, reduce Cost of Non-quality by 25%. The European lighting industry is offered a unique competitive advantage, necessary to catch the 30-40% speed of growth of its LED market and tape into potential new markets.