Question
Hello Wayne!

I'm new to orchid care.  Three or four weeks ago, I purchased a small dendrobium from Publix.   It still has flowers the one flower spike and looks nice, although a few of the leaves have dried, yellowed and dropped off.  The flowers are starting to look a less perky.  I figure this is normal.  I have it in the kitchen where a flourescent light is on 24-7. Air is moving as the AC vent is nearby, although the plant is not directly in the path of the air.  I have the pot sitting on an upturned saucer that is resting in a wide class dish.  I have watered the plant once a week.  The water immediately drains into the glass dish and I let it stay there to provide a little moisture via evaporation since our house is dry.  The bottom of the plant's pot is not sitting in water. I have it tilted slightly on the saucer so one side is completely dry and the other side can wick a little water that sits on the bottom of the saucer for a few hours.  The plant came in a plastic interior pot inside a clay pot.  The identification stake is marked: DEN.EIMA LAI.  The grower is kerry's.

Two more leaves are starting to yellow.  Is this just the normal life cycle of the plant or am I killing it?  I appreciate your suggestions and insight.  
Thank you, Diane

Answer
Thank you for the detail Diane.  The plant to which you are referring is a New Guinee dendrobium.  These are mini-dendrobiums but otherwise behave as most dendrobiums.  They prefer a rest period after flowering during which they lose most or all of their leaves.  This is a signal to reduce the watering to once every other week to prevent root rot and yet prevent the canes (ie upright growths) from shriveling too much.  You may resume once weekly watering and feeding when new growth can be seen.