most strains will have 2 and even 3 sets of hairs. i wait until at least 2 sets have turned orange, the plant will also slow down intake of water and nutes. at this time start checking thrichomes.
buy a 60x jewlers loop from ac infinity its like 10 bucks. then check the thrichs
if you want uplifting feeling go with all cloudy thrichs
if you want couch lock sedative feeling let 30=405 turn amber orange color
if you want it half and half, then allow 10-20% to turn amber and the rest cloudy
hope this helps
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