if you dont have a strong enough magnifying glass to see the trichomes like you need to
then go by the white to brown (hairs) ratio i think its like 70 to 80 percent brown hairs
but buying a magnifying glass is the best thing you can do
and the trichomes will turn a amber color and start to hunch over and thats when its time to harvest
and wow on the grow its looking not to bad considering the low level of light!!!!!!!