Sedum rubrotinctum - have I blown it?

I have just read that it is advised to move S. rubrotinctum to a cool, dark place between November and March. Mine has stayed all winter at the front, south facing, and in contrast to its full colour over the summer and early autumn, now looks shrivelled and emaciated. The bunches of leaves are pale, not red. It has not been over-watered. But I fear the plant has had it. Has it?

 

Where did you get the advice from? All Sedums need good sunlight, all the year to be successful. S. rubrotinctum is slightly less hardy than some so it would be better kept frost free (ish) over winter, but certainly not in the dark. If there are any unshrivelled pieces, take them off and try getting them to root as cuttings.