Could this be sun bleaching?

I put my plants outside from my tent. The lights are weak in my tent, I'm just vegging in there. I figured after we had all of that rain last week, I could flower a few before June. I've given her Jack's 20-20-20, cal-mag, 300ppm, 6.3 Ph, peat and perilite media. All of my other plants do not exhibit this whitening of the leaves. At first I thought it was powdery mildew, but it starts off glossy white on part of the leaves and then turns brown. There isn't any powder. Should I just move her to a shady spot or could this be some sort of disease that I should just chop and start over?

You just wasting time mate.

What's the humidity in your tent?
What's the humidity outside?

Humidity in my tent is from 49% to 57%.
The humidity outside is from 50% to 74%.
These last few days have been very clear and even warm. 68° right now, but It gets in the low fifties in the morning. Could the large swing in temperatures and humidity, cause the leaves to just dry up? The strain is northern ninja. I think it leans indica, but I have not flowered it until now. I have two other northern ninja just a few feet away, but they are not doing the same thing. They are from seed. Vegged for little more than two months and put them outside last Saturday. The two not affected, are not growing much, but I figured the cold doesn't help.

It looks like you've got at least a couple issues, potentially some nute burn, also you don't want to move indoor plants into direct sunlight without "hardening" them for several days. As you said (and I can see from the lack of leaves and big internodal spaces) you have a weak light. Place them is a shady place, and slowly introduce them to natural light, or they'll fry (which they did). At this point ,if they don't recover and start putting out nice fresh growth soon, I'd start over (with a better light). The cold temps aren't helping much either, but it's not what caused the damage, unless it froze.

I'd just start over. No offense but those are harsh looking. How often do you water?

Usually plants grown indoor have no uv protection.soo when you put them outside you have to do it daily when sun is weak a few hours or in a shade for a few days. They might recover but you fucked them hard

yep, start again my friend. there good for nothing sorry to say

I suppose nature finds a way. It had been cloudy for quite a few days before I put them outside. Why wouldn't that continue? It was early February. I was hoping that the rain wouldn't flood my plants. Not too worried about sun bleaching. We usually get a little taste of summer at the end of January and that was over. We only had a couple of days of warmth this year. GLOBAL WARMING!
Anyways, when I put the girls outside, they had a couple of overcast days, but then the sun came out awful powerful, but it only burnt this one plant. I asked RIU and of course there are a bunch of quitter types. I try to lean towards 'life is good.'
I put her by my fence that has some shade during the sunny part of the day. I cut off most of the dead growth, but I left some of the dying leaves. Seems like those leaves keep dying while new growth isn't too affected. We had a little rain, but not as much as the begining of the month. I moved her out of the rain, because I had just watered her Friday. I did sprinkle some Recharge around the base, and now she is looking almost as good as my other plants. Not as nice as when I put her outside, but better than last week.