I thought I read on here somewhere not to use distilled water because it doesn't have any of the natural nutrients that regular water has. It is stripped of all of the essentials. Not 100% sure but may be your problem.
2 much nitrogen will cause excessive leaf production & late blooming. They will come along & produce. Same thing happened to me last year with my peppers. A lot of leaves & late producing fruit. Got a good harvest but the hard frost came before many got to finish.
Thanks dude I've always been a mh/hps grower but summer temps are a bitch here & like you I need the heat of the big lights for winter. I'll be eager to see how well these LEDs work with your grow to see if I'm willing to give these a try.