“Advancing Human-Centric LED Lighting Using Na2MgPO4F:Eu2+” ACS Applied Materials & Interfaces To be more energy efficient, many people have replaced their incandescent lights with light-emitting diode (LED) bulbs. However, those currently on the market emit a lot of blue light, which has been linked to eye troubles and sleep disturbances. Now, researchers reporting in ACS Applied Materials & Interfaces have developed a prototype LED that reduces — instead of masks — the blue component, while also making colors appe...