I agree that light is critical to an indoor grow. I consider 30 watts per square foot (320 watts/meter2) the minimum but 35 watts per foot (375 watts/meter2) of high quality, modern white grow light is better.
Photo period plants do produce more yield in general. They (photo period plants) are no more difficult to grow than auto's. The only difference is at some point you change the light schedule... very simple.
Auto's have gotten pretty good, still not equal to photo period, but they are pretty good. The biggest benefit is that you can grow plants that are at different growth stages under the same lights. This is helpful if growing different varieties or plants of different ages at the same time. If you do a grow start to finish before starting the next grow then I would tend toward photo period plants for their higher yield.
200-400 watt lighting and start growing photoperiod plants and forget about autos.
Autos do not offer anything that can not already be acieved with superior and genetically more stable photoperiod (fem) plants.
When growing photoperiod plants, YOU controll when they flower and you can veg the plants as long as it takes to fill your grow space before flipping to flower.
Autoflowers flower when they get to a certain age, not a certain size and this is why growing autos can lead to major disappointment, spending 10-16 weeks waiting for one foot plants to do their thing.
Indoors, lighting is the biggest issue.
Spend everything you can afford on decent lighting and the results will come.
Economize on lighting and disappointment will follow.
You are basiclly trying to provide an artificial Sun.
Cheap or weak lighting is like growing under heavy cloud cover, the plants just don't get enough lumens to grow big buds.
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