A tip for putting out the fire, or at least toning it down, drink milk or eat ice cream. The fat will adsorb some of the heat. Drinking water, beer, etc. just makes the heat worse.
I found this out one night after handling some Fatali peppers. I washed my hands, but not enough...I went to bed, and as men often do, gave myself a good thorough scrotal rub. About 15 seconds later,
I ran naked and whimpering into the kitchen, grabbed the ice cream out of the freezer, and applied a big handful to the afflicted area. Ahhhh, bliss.
Then my girlfriend came out of the bathroom, took one look, and collapsed, in hysterics. She laughed until she puked...
Sigh. Sometimes shit just happens, ya know?
Look anything like this?and its not like spots it just kinda fades dark
Just slow down and assess the situation. Now that I think about it I had the same thing happen last spring, but it was only two of my tomato plants. It looked horrible, but then it reverted to green.
1) Is the new growth black?(I saw the pics on your page, but only I saw that the first set of leaves was discolored). I believe they should be fine if the new growth is green.
2) Did the new growth actually stop?
It may seem like it, but mine have been growing under an HPS for about a month or more and they are only 8-10 in.(that's a week after the switch to 12/12 too!)
3) Are the black leaves dead or alive?
4) What are your temps?
5) Humidity?
Sometimes if they have too much moisture built up they will mold at the nodes, but you have a different situation here. Sit back and relax, because I think you'll be just fine.
Peace
BOY GENIUS