What size light for a 2 by 2 by 4 grow tent

Couch_Lock said:

Actually you are wrong. 3500k is best for both.

http://imgur.com/AGR48FO

3500k is the best spectrum for seed to harvest, the Rspec in particular has added blue + far red........have a Timber 3000k 90 cri, its not all purpose, its just a supplemental flower light to me

Click to expand...

Really according to who? Greengenes says trough all of their testing 3000k has consistently out performed 3500 or 4000k with yield, quality and bag appeal. He also said that 3500k chips are made inferior. If I'm wrong, then why are the vast amount of standard configurations 3000k?