Last 2 days before harvest - 100% blackout total darkness. 48 hours, then - turn killer and chop her down.
Hang & dry at as low a temp as you can achieve (within reason. about 62 degrees is about as low as you really want to go - but you've GOT to have CLEANLINESS and AIR CIRCULATION - or you'll have trouble with mold or mildew, and you do NOT want that!!!!
RH in drying environment shoud be between 50 and 60% with the "safer" side of that being 50%. You'd rather have 35 or 40% and have to cure a bit longer to get a good flavor, than to go too high and throw everything away because "smoking mold or mildew is NO FUCKING BUENO!