Same with me..I have 100mw Green and 30mw Green both are Pen Style..And with 30mw Laser I can burn but with 100mw i cannot...At first I think that is because of the focus but 30mw-(2xAAA 1.2 Rech) is more visible and brighter than 100mw-(2xAAA 1.5V)..Dont know WHY ???