1st grow Autoflower Question

So this is my 1st grow 6 bubblicious autos and 6 weeks in they have started flowering.My question is to anyone familiar with Auto strains and has grown them before: Should i continue to leave the light at 18/6 for flowering as well or should i switch it at all?Also how long should i flower for? I just want the biggest yield possible.After finding out u cant clone autos i will never be doing autos again lol.Any insight would be greatly appreciated...

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