I tell people over & over, autoflowers are not photoperid plants nor are they run the same, autoflowers like blue light full spec has red and ir in it and can make your autos go into flower prematurely, why would you get less yield outdoors? Bc the sun is full spec and some strains flower early and or dwarf out, once your auto is ready to be flowerd you switch the spec from blue to full red / bloom, late in the veg stage you can flip to full spec to help the plant flower but growth will slow considerably autos are mostly ment to be grown indoors, this does not matter with photoperid plants bc you cut the cycle to induce flowering or rather the days shorten induceing flowering you are outdoors so the strains your running are going into flower bc the sun has red and ir in it. so your yield will be smaller but you can allso run multiple grows this summer and that is why your autos are flowering early..