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Does light distance affects flowering time?

Just wondering what the general concensus is on this.

I have a 2x2x4 ft cab with a 400 hps cooltubed

It appears to me that specifially my last 2 grows seem to be done 3-5 days before accepted finishing time. My last grow I harvested 2 days early, 54 days flowering, and the buds were over mature IMO.

Here I am again one week from "printed" harvest time, and my purple deisel and grand daddy purps have 70% red hairs on them. Im affraid if I let them go another week they will start to over mature.

So my question is this........

Can the light distance from the canopy cause an accelerated finishing time by a few days?

I have my canopy about 3-6 inches from my tube with a 50,000 Lumen bulb, it runs at 78 degrees.


Thanks for the insight!
 

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