If my memory serves me: Amber trichomes indicate the THC degrading into CBN. If you harvest when the trichomes are milky or clear but not amber you'll have hi

If my memory serves me: Amber trichomes indicate the THC degrading into CBN. If you harvest when the trichomes are milky or clear but not amber you'll have higher THC vs CBN. But this earlier harvest comes at the expense of yield as you sacrifice time that would be spent with the buds increasing in size as they become ever more sexually frustrated. Black market cannabis tends to optimise for this.