The week's photo shoot required the girls to direct their own lighting using flashing light sticks.

Caleb tossed his hat and the light stick to the ground.

But I'll only use a light stick and not more than once a week.

The light stick on the left has been activated and kept at room temperature.

Since their invention 25 years ago, light sticks have become a Halloween staple.

While it may seem like supernatural magic, the technology behind light sticks is actually very simple.

The chemical reaction in a light stick usually involves several different steps.

A single light stick hung from the ceiling of the otherwise bare room.

It was growing darker; and here, in an almost open country where there were no light sticks, that would shortly mean a great deal.

He swung what appeared to be a light walking stick.