how many plant under these three leds in 10 lt pots

so in terms of brands of the lights I have the two big 240x3w led lights that i believe to be 720 watts each but according to people on here they probably only let out around 200 watts of real power and the brand I am not sure as someone gave them to me but I have grown 4 autoflowers under one of them before all the way to harvest with no problems they have two switches on them one for veg and one for bloom and the new 600w full sprectum I just got from someone yesterday I think it had the name mastergrow on it so yh I will add some photos and please tell me what you think my plan is to place the two big 240x3w leds on the sides and the new 600w full sprectum led I got in the middle and have the 10 plants in 10lt pots under all the 3 light I have if you think it's still not enough light please tell me how many under all three lights will be good to grow well i dont mind getting rid of some if it means the others have enough space and light to grow well the strains I have are 2x lemon,5x ak420 and 3x bcn critical xxl they are all photoperiod plants please help and give me your best and true advice. thank you.

Most people on here will tell you not to use those lights to flower, but up to you. If you have access to a device like a kill-a-watt, you can check the actual wattage the light pulls at the plug. My friends 600 watt blurple draws 60 watts at the plug and probably gives him closer to 50 watts to the diodes. Free lights are free though but they still cost a little money to run but mostly they cost you bud weight plus the time and money you put into the 3 plus months it takes to run a cycle.
You have 10 plants, 10 liter pots aren’t real big. It’s probably best to keep all 10 for now. See which ones do best, transplant up to the final pot and flip a bit early. You could make some walls out of styrofoam or something else white to reflect the light back to the plants and I’d have them right in tight to that corner trying to reflect that light.

If you do as advised above by mustgro and flip them when small you can probably do 6 I would say at best with those light but maybe all 10 but I would try to upgrade your lighting a little when possible. There is some really nice cheap quantum boards on Amazon for 40 bucks that would help you get much better harvest. I believe they are the melon farm with the Samsung LM301B diodes and mean well drivers for the money it’s a steal. You also could add some CFL’s with what you got and make it work to get you through this grow but 10 plants is a pretty big grow unless you keep them small and only veg for a couple weeks. Good luck