I cant say what the problem is because the pics are fuzzy normally white dots are a sign of mites. can you see anything moving? stare at the leaves real close a heavy mite infestation will show some thin webs. they spin webs to keep dry. if its thrips you will need spinosad not sure if neem will work. mighty wash worked real good for flower so do hot shot no pest strips but you will need a few. 9 days into flower means you need to get busy real soon. if I were you I would take them to the bath tub and give them a good shower. get some baby shampoo mix it in a spay bottle with water just a table spoon of soap. tip the plant upside down and spray the undersides of the leafs. wipe the leafs with your fingers or a sponge real light and give it a rinse mites hate cold water. If its bugs then it will spread, if its just on one plant then I wouldn't have a cow just try to wash it off and dry your plant before you put it back under the hid light