Bengal fire
Bengals are flare candles mainly used to achieve indirect pyrotechnic lighting of surfaces or buildings e.g. castles. The unnatural illumination is made use of to evoke feelings of warmth etc. in the observer and to stage the lighted areas.
The items are expected to emit a brightly coloured light for a long period of time and for this purpose the composition must meet special requirements:
a) The compositions should produce maximum colour,