One tiny light is all it will take to extinguish complete darkness.

BBC: Missing pieces in Utah

"It's not very good, especially this time of year when we're having to walk to work in the dark, complete darkness, " Ms Twogood said.

BBC: Dorset midnight street light switch-off to continue

Altered day-night cycle: the Antarctic winter involves a period of over three months of complete darkness where the sun does not rise above the horizon.

BBC: Viewpoint: The last great polar challenge

They plan to travel almost 4, 000 kilometers (2, 485 miles) through icy wilderness mostly in complete darkness and in temperatures as low as minus 90 degrees Celsius.

CNN: STORY HIGHLIGHTS

As with its little brother, though, the flash was borderline useless -- washing out anything in the foreground and casting the background into almost complete darkness.

ENGADGET: Samsung Focus S review Mobile

After that, it was complete darkness.

CNN: 'Innocence' survives 11 hours under bomb rubble in Syria

He wants to complete Kona in 11 hours before darkness falls ("NO GLOWSTICKS" is a Kona mantra, since runners are given glow sticks as night falls).

WSJ: Jason Gay: Italian for Dinner, a Triathlon for Dessert

Due to darkness, eight golfers were unable to finish their first rounds, and will complete them on Friday.

BBC: SPORT | Golf | Rose shares lead at Nissan Open