I plan on buying a blu-ray laser or one close to that nanometer range. I am curious though about some of the aspects of them. I am thinking about getting one around 100mW because I would like to be able to burn a match or maybe a candle. I heard about them having like 4x, 6x, 8x, or 12x diodes too. What does that mean about the laser? Is there any decently priced blu-ray lasers you can point me to?