Here is some additional info about the Children of the Light from their excerpt from the Wheel of Time [Companion][1]Companion:
A society of men who followed strict ascetic beliefs, owing allegiance to no nation and dedicated to the defeat of the Dark One and the destruction of all Darkfriends. Founded by Lothair Mantelar in FY 1021 during the War of the Hundred Years to proselytize against an increase in Darkfriends, they evolved during the war into a completely military society. They were extremely rigid in their beliefs, and certain that only they knew the truth and the right. They considered Aes Sedai and any who supported them to be Darkfriends. Known disparagingly as Whitecloaks, a name they themselves despised, they were headquartered at the Fortress of Light in Amador, Amadicia,
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but were forced out when the Seanchan conquered the city.
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Their sign was a golden sunburst on a field of white, and the sunburst was displayed on their cloaks and tabards. An exception was the garb worn by the Hand of the Light (also referred to pejoratively as Questioners), a relatively independentinvestigative branch within the Children’s organization; their cloaks were adorned with a red shepherd’s crook behind the sunburst. Questioners reported to the High Inquisitor, who only wore the red shepherd’s crook, suggestive of his independent authority. The Children were a cavalry force, and their largest unit was a legion, which was roughly two thousand troops. Officers wore golden knots to indicate rank.
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The last known leader of the Children was Galad Damodred. They fought alongside the armies of the Light in the Last Battle.
spoilers end [1]: http://www.amazon.com/The-Wheel-Time-Companion-Bestselling/dp/0765314614