... cubic crystal system, work effectively under the excitation of 253.7nm uv and cathode ray. It gives out orange-red fluorescence, ... 84%, excited light reflectance 0.233, monochromatic fluorescent lamp efficiency 73.21m/W.2 Green PowderMgAl11O19:Ce3+,Tb3 ... for compact energy-saving lamp,Straight pipe lamp,Ring pipe lamp,CCFL,The lamp with lampshade,Electrodeless lamp andFluorescent lamp and so on. ...