From smart bulbs in private households to efficient greenhouse lighting to attractively staged architecture, depending on the application soft or signal colours might be needed. The light might need to simply shine, or illuminate something else. So OSRAM Opto Semiconductors has added a new method to its colour LED manufacturing capabilities. Normally, the semiconductor crystals in LEDs generate the colours directly. This gives a narrow spectrum peak (for example, 600 to 630 nanometres for red), which the human eye perceives as a very piercing light. By contrast, the new production method uses only blue semiconductors as a basis. A luminescent material with the desired colour is added in packaging, i.e. assembly. As a result the LED covers a wider spectrum (550 to 700 nanometres for red) and the colour appears softer. With this innovation, OSRAM Opto Semiconductors is able to make LEDs with exactly the kind of light its customers need. It also meets all other industry-specific requirements, as a look at the following key applications will demonstrate.