Based on your picture showing the lights, you cooked em. Too much light, too close, and the heat from that cooked them. I had a 35w bulb about 2 inches from the top which was fine, then switched to 65w at same height and I warped my plant. Next time try starting out about 6 or 8 inches and slowly moving downwards to the tops. But a setup like you have is going to create way too much heat above them.
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