Looking great, the pics get washed out by the HPS, so kinda hard to tell whats going on. Buy a 30x jewlers loope or some sort of microscope to take a look at your trichomes...the combination of cloudy/starting to turn amber trichomes + swollen calyxes + receeding browning pistils tells you when to harvest...
I'd suggest next time using larger pots, these seem to be getting a little too much water and not enough nutrients to get full potential due to getting rootbound, but excellent growth so far. Just a guess I'd say maybe 1-2 weeks left, but definately get yourself a magnifer, hell pinch off a bud and quickdry it to test out the high...judge the length of the high combined with the amount used and the type of high(heady vs body) vs smoking your normal bud...expect the finished product once dried properly and cured to be 1.5-2x more potent.