Question on light with auto flower

So I have 4 Regular seeds in a tent right now under a 600watt hps ( less then a week old ) Once I find the sex on those I plan on removing the males and introducing 2 Auto silver bullet feminized seeds to the tent (praying I end up win 2-3 females , so let's say that happens , what's everyone's thoughts on the light source ? Never grew with autos and I also will have the other genetics in there that are not auto flower , I also want to say I figured since the auto flower is more flexible with light that would be fine going into a 18/6 and then when the others go into flower it will be 12/12 , exhaust is good and the room stays between 71-77

A little confused on what exactly you're trying to ask. Using a 600W hps (depending on the size of your space) seems like it should work perfectly for your plan. I have actually ran a similar setup. I had 2 autos (early miss from crop king seeds) 2 photos (1 super silver haze, 1 purple kush from crop king seeds) started at 24/7 for 5 weeks. The autos were already a week and a half maybe 2 weeks into flower, and the photos were vegged close to where i wanted them. All under a 600 watt cooltube MH. Took my clones from the photos, and finished all 4 plants under a 600W hps at 12/12 in the ensuing weeks. Autos finished 3 weeks before my photos. It worked well. Good luck.