Low temperatures, low light intensity

The external excitation light source , electron transitions from the ground state to an excited state (process 1 ), part of the electronic transition back to low level characteristic emission of Eu2 + generated (process 2 ) and the other through the relaxation process glowing stone pebbles btrap levels capture ( process 3 ) . When stored in the trap of the electron energy absorption , re- excited back to the excited state , and then jump back to glowing rocks state to produce light. Electron temperature is not conducive to the excited energy level from the trap back to the excited state , so the light intensity is low at low temperatures , when the ambient temperature is increased in favor of the trap level in the excited electron excited state back , so the temperature is high luminous intensity is strong.