Ah well It may be a long time later but I did figure out what was going on once everything was harvested.
They weren't black once I got them out of the grow room they looked more brown, but I do think the trichomes were just starting to degrade slightly as once I could see them properly the "black" ones did look a bit shrivelled. I would put it down to stress, it must of caused early degrading of the trichomes.
It smoked well had a nice high to it but wasn't massively strong.
Got 8 oz off that one.
What rusty trikes said sounds about right though, I did mist them while the lights were on. [FONT=Arial, Helvetica, sans-serif]
I have learnt a lot since these days though.
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