I think your post and the reply of the previous poster is a perfect example of why comma's are important. You meant a "green, light-absorbing dye" (using hyphe

I think your post and the reply of the previous poster is a perfect example of why comma's are important. You meant a "green, light-absorbing dye" (using hyphens to make the distinction clearer), the previous poster understood "a green-light absorbing dye".