I got to agree with
Toker1 on this one. It's a genetic Lottery when you have a hermi, you can save seeds, and grow it out, if you have the time/space/ect.. Iv done it and had it go both ways, sucks to chuck a 8 week old plant but is great if you get nothing but females. If you do keep seeds and the next plant goes Herm like this its time to trash them all for sure. The big question is Do you have the means to keep them?
Keeping the plant, you will have some seedy weed, we've all had seedy weed, are you ok with seedy weed? Then just keep it at 12/12 and get it done. Any light change will just add to the situation and or/and delay it, be prepared that the other plant in the tent can have seeds, you have open pollen sacks on this one.
Farmall it is in my opinion that this plant is a genetic hermaphrodite from the 1)age of the plant (looks like 4-5 weeks) and that the sex has 2)matured together at the same time in the same places and 3) there is abundance of both sex.
Heat/light stress nanners happen at the top of the plant, light leaks are isolated to specific area, plants will have health issues with environmental issues, the pictures and info provide is going to suggest its over the whole plant and it's healthy.
Sex can be influenced by genetics and environment, genotype and phenotype. Stability of your genetics and knowing where they come from is the big question when you're limited on time/space/money/patience....
​​​​​​​good luck
lonnielmb72