A Japanese research team led by Tokyo University of Foreign Studies and Tokuyama chemical company has developed a new efficiently deep ultraviolet sterilization LED lamp, featuring small volume, electricity saving, environmentally and long lasting, compared to traditional low pressure mercury lamp.
 
This new LED lamp can work with dry battery, and be used in portable sterilization device and nutrient solution sterilization. The technology has received basic patents from Japan and United States, and is scheduled to be commercial in 2015.