I'm not sure I follow, are you saying the corals bleached because you weren't feeding them or because there was too much light? Not feeding a coral won't cause it to bleach, only too much light, too hot, or wild swings in parameters cause bleaching as far as I know.
I think cutting back on your lighting was a good place to start, but some LPS have a really hard time coming back from that once it's happened. I bleached a small colony of blastos by putting them too high in my main tank and it took them nearly 4 months to finally die, but I think they were doomed from the start.
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