There are so many great ideas for chandeliers and lighting in sukkahs that there is no need to sit in the dark!
This article from The Jewish Woman about Lighting Your Sukkah has several cool examples of lighting, including this plastic cup hanging fixture:
Here are instructions for a hula-hoop chandelier, which would give a lovely glow hanging in a sukkah:
Or simply fill one or more lanterns with twinkle lights and hang from the ceiling of your sukkah or display on tabletops:
Pumpkins and other harvest vegetables that are traditionally used to decorate the sukkah can be made into beautiful votives. Just pop the top out with a cookie cutter and tuck a candle inside:
See your sukkah in a new light!