Yellowed Back Bulb

[jrodpad]

Hi guys - I recently inherited a lovely Pot. from Carter and Holmes. I worry that I don't have enough light for it, but it's been managing. It was in bloom for almost 2 months. Then it lost it's flowers all at once. What worries me is that around the same time the flowers died, the stubby little back bulb, which used to be green and healthy looking, turned yellow/brown and sickly looking. I've never had a pot. or any other orchid in this alliance so I'm not sure whether this is a sign of trouble. Help!

Any suggestions/info would be much appreciated.

Thanks

-J