These are a new designer breed of Christmas bush. Regarding any margin of safety, discontinue burning a candle when 2 inches (2") of wax remain (1/2 inch if from a container). These fibers transmit light involving the two ends of the fiber making a magical array of white or colored illuminate. https://Icskorea.co.kr/bbs/board.php?bo_table=free&wr_id=133806