450 nm IPL Machine

The 450 – 1200 nm wavelength emits blue light which is efficient at destroying the bacteria which helps to cause acne. One down side is that this wavelength can be limited to how much is can penetrate the skin which can make the treatment of deep blocked pores difficult. There have been recent studies to show that 585 nm is also very useful at treating stubborn acne.

Why does this wavelength have a broad spectrum of 450 nm – 1200nm?