What riddle would you have given to stump Gollum?

In a dark tunnel I saw a bright light;

All saddle, all bridle, all fit for a flight.

I told you three times, but you still don't know.

There's two answers but the first answer (and original answer) is ALL

ALL saddle, ALL bridle, ALL fit for a flight.

The second answer someone else pointed out to me is A

In A dark tunnel I saw A bright light;

All saddle, all bridle, all fit for A flight.

There's also another version of this riddle:

In a dark dungeon I saw a bright light;

All saddle, all bridle, all fit for a flight;

Steel was his arrow and brass was his bow,

There are three answers you still do not know.

That would be funny. But Smeagol's Bane said only things that are set in the timeframe(ish) of Tolkien's works.

Dragon Magazine #175 has a couple of articles on riddles. Here's one Gollum may get but probably with great difficulty:

A man of a hundred stood out in the cold,

Exchanged his gay headdress, of colors most bold,

'or one of pure ivory just now a day old.

But though freshly dressed, the old man stood alone --

It was his misfortune to live in a wold.

I am colored red and blue and yellow and every other hue of the rainbow. I am long and short, thick and thin, and I often rest coiled up.

I can eat a hundred sheep in a row and still be hungry. What am I?

Not a cloud. Something more terrestrial and man-made.

So rope and thread are close but no cigar? I guess I must quote Gollum, then.

"String... or nothing!"

Gotta admit I'm stumped.

Hint on my riddle: It can light up the darkness.

Candle it is!