help please

these is my secound crop first one went weel used 400watt hps and 20-20-20. my secound one started off fine useing 400watt hps and 20-20-20 then started using 1000watts hps and monster bud fore flowering and lost 10 plants so fare just wonding if anyone can help

whot has happed to your plants? need moor info, is it heat? have you get a good fan on them? is it soil or hydro? how much feed are you givin them?