This very cool LARP light comes from....er...somewhere. I stumbled across it in an Imgur album over here, but can't find any identifying information for the game it was used in. From the costuming and faction branding I assume it was one of the high-end EuroLARPs. Both TinEye and Google image search only link back to the original or reposts of same.
Anyone recognize where this is from? Using welded chain stretched in an arc is a brilliant idea to make it look like the crystal is floating.
Update: This piece is from the 2012 "Conquest of Mythodea" LARP event in Germany. My thanks to the commenters who identified the source.