aerial training flare or flare simulator comprising a polymeric case , a begradable polymeric candle housing , and a candle comprising a pyrotechnic illuminant and an environmentally friendly , fast - burning ignition composition . an expulsion cartridge ejects the candle and the candle housing while the case is retained on the launching aircraft . the only major component of the flare which falls to earth is the partially melted candle housing , which is biodegradable and thus reduces requirements for environmental cleanup .