On May 16, 1960, physicist and engineer Theodore Maiman performed the first successful operation using laser technology. To commemorate this, in 2017, UNESCO declared every May 16th the International Day of Light. Since then, activities have been organized around the world to highlight how light plays an essential role in a wide range of different fields: from science to culture to education. The Leitat technology center is well aware of this and continues to work to find new applications for light. From its laboratory located in Barcelona's DFactory, the internationally renowned Industry 4.0 ecosystem promoted by the Barcelona Free Trade Zone Consortium, Leitat's Photonics and Vision department leads highly complex projects. To this end, it applies optical sensing, hyperspectral vision, and laser technologies, aimed at solving challenges in fields such as Industry 4.0, healthcare, agri-food, energy, and the bioeconomy.