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Just curious if anyone does or has experimented with artificial sub up/sunset? Running under both a mh and hps, I have the hps coming on and off a half hour earlier then the mh. Could be a waste of time (haha, literally) but wondering if it could affect quality/quantity?

Week old two weeks old Three weeks into my first grow back from a 7 year hiatus. 5 plants currently under 1000w hps and a 1000w mh. In my secret home made soil mix. (aged manure, peat, vermiculite and perlite.)