Trade mark |
Added impurity |
Impurity quantity % |
Other impurity |
Electric discharged power |
Color sign |
WL10 | La203 | 0.8~1.2 | <0.2% | 2.6~2.7 | black |
WL15 | La203 | 1.3~1.7 | <0.2% | 2.8~3.0 | gold |
WL20 | La203 | 1.8~2.2 | <0.2% | 2.8~3.2 | Sky blue |