... is 12~18umUNO-8E ----- Averange Partical size is 5~10 umUNO-7 ----- Averange Partical size is 55~65umUNO-6 ... reach 28000 mcd/m2 and can glow more than 13 h; For "8" Serious UP, the hightest initial brightness ... reach 22000 mcd/m2, and can glow more than 12 h; For "7" Serious UP, the hightest initial brightness ... 17000 mcd/m2, and can glow more than 10 h; The lowest initial brightness is 7000 mcd per m2