2nd Grow. have some questions (white widow)(pics inside)

Ok so i am on my second grow here.
doing it in soil.

under a 600 watt MH bulb 1 T5 Single bulb and a few cfls.

i am on day 12 , and here are some pics, im not sure why the lower leafs are starting to look like this please help?

those yellow one the plant doesn't need any more. couple of them look a bit under the weather. what's your temp range, light schedule, feed protocol?
also i am on my 3rd widow crop and IMO they are light hogs and to get the most out of them they need lots of light. last crop i had two big bug and two widow two per 600w hps. this time i went with just one widow per each hps. i wont get as much as last time but the plants look so much better.

looks overfed, are u feeding. Other than that looks to be a little stretched, maybe lower the lights a bit. Just water with plain tap, ph if necessary and wait to see in the next days to come. All in all looks great bub. Best of luck

600 watt MH, 1 T5 and 3 CFLS right now plan on adding a few more cfls or maybe another few T5 idk what yet

lights on 18/6 no nutrients yet. Just water from the reservoir . they are in either 3 or 5 gallon smart pots.. i cant remember honestly.

but yea basic soil with no nutrients in it right now. and i will be using fox farm nutes when ready.

ill try lowering the light ^^ also as for temperature it ranges thru out the day. between 70-85.

i have an AC on a timer because if i didnt have the AC on it hits 90+ degrees. so AC kicks on when temp hits 85 and brings it down to around 70-75 then shuts off

right now i am also going through about 1 gallon of water to all 8 plants.. Is this to little or to much?

i am not really sure how much water to give them. is their a chart somewhere? or a guide to follow?? i want to do this 100% correct

please help if any1 can!!!