This is a FULL SPECTRUM light. Its spectrum resembles sunlight: 380 nanometer purple all the way to 840 nanometer infrared.
Our new microwaved world drowns us in a sea of non-native EMFs, we need to mitigate this EMF pollution using sunlight and full-spectrum light devices.
This FULL SPECTRUM light can be worn on the radial artery on the wrist (compare to $750 Quantlet), it can also be used as an intranasal light therapy device (Compare to $399 Vielight). The nasal cavity is rich in blood vessels.