I'm at the part of the game where you can't unlock the door unless you
are in total darkness, the only trouble is I have a candle icon lit,
and I have had this candle on for a long time, and I don't know how to
turn it off.

Is there any way to turn it off, or to get past the gate? If not I'm
totally stuck.

Thanks in advance for any help you can give me.

JB