A data storage element includes a substrate comprising a semiconductor material, a metal oxide layer including an electrically insulating rare earth metal oxide disposed upon a surface of the substrate, a conductive material disposed upon the metal oxide layer, a first electrode electrically connected to the conductive material, and a second electrode connected to the substrate. The TTCP particle has a basic calcium phosphate whiskers on a surface thereof; the basic calcium phosphate whiskers having a CaP molar ratio greater than 1. The auxiliary hole is operable to receive melted solder therein. The controller controls the variable time average flow of each current flowing through the colored LEDs as a function of the spectral output selected by the user.