Sorry i didn't have time to read all the posts.

YES the reflectance of Cannabis is used by police to find outdoor grow ops
they can actually find very small ones

What they do is they have some sort of camera that looks for the "reflectance" it just means the spectrum reflected by the plants tissues.

Heres a chart of cannabis's reflectance and other plants.

it's very different. Different enough they can use it.

harris,