yellow spot

HELLO AND THANKS IN ADVANCE FOR ANY ADVICE SO THIS IS MY FIRST GROW I AM GROWING IN A TENT INDOORS USING A 400 WATT LED LIGHTING AND ALSO PUT ANOTHER LED I HAD LAYING AROUND IN THERE ALSO I HAVE IT ON A 20/4 LIGHT CYCLE PH BALANCED WATER AT 6.5 MY PLANT ARE LITTLE OVER 2 WEEKS AND I NOTICED...

Hi guys, I am new here on the forums and a first time grower. I got 2 seeds started just 2 weeks ago, and I've started encountering problems with both my plants. I will try and give you as much information as possible and include pictures. To start with, some basic info about my setup...