Yea but its only 39 days into 12/12 and only VERY few haires have tuned amber.. So i might think there is some time left in them..YOUR PLANT IS FLOWERING!!!!!!! and it clearly looks like your getting toward the later weeks, this is very normal in flower and nothing to be worried about. These plants are annuals in there natural enviorment after they are done flowering they die. Thats what we call a nitrogen deficiency but its not bad because in this case your plants using it to finish up its life cycle. Dont listen to people when they tell you to give it more nutes in flower, your just going to flush it anyways.