Intermittent light is an interesting concept, as it provides opportunity to save in lighting electricity costs. This approach was taken in the Regen-Forest project. Aim of this project was to develop, construct and introduce a new LED-based technology, able to promote production of forest tree seedlings in a cost efficient and environmentally friendly way. Take a look at the video clip that explains the project idea and shows the production unit with seedlings of varying tree species (e.g. spruce, pine, oak, beech) growing under three Valoya B100 AP67.