Byproduct metals and rare-earth elements used in the production of light-emitting diodes???Overview of principal sources of supply and material requirements for selected markets
The use of light-emitting diodes (LEDs) is expanding because of environmental issues and the efficiency and cost savings achieved compared with use of traditional incandescent lighting. The longer life and reduced power consumption of some LEDs have led t
Wilburn, David R. wilburn@usgs.gov. Byproduct metals and rare-earth elements used in the production of light-emitting diodes???Overview of principal sources of supply and material requirements for selected markets. 2012-01-01.