Whats ur genetic? 6 week from what i know is probably a little bit too early! I would let her for another week or 2 depending on the strain and its also alot about your personal preferences! More cloudy buds will give you a really good head high/spychadelic but wont laste too long :S Ambers buds will give you more of an indica buzz like and laste much longer!
Also if you give ur plants more light for ambers you will in the same time improve your final yield which is great! Its all about your choice buddy i hope i was helpful and btw sorry if my english isnt too good