[1] It is described as an unexplained light occurring on dark nights as bright as a mercury lamp that changes its colour to blue, red and yellow and resembles a moving ball (reported also pear shaped form) of fire, which may move as fast as an arrow but may also stop.
[1] Some reports claim the light can only be seen after 8 pm on dark nights, are always two to ten feet above the ground, and if followed during the night, one could be misled from the road and lose their way in thorny jungles or desert of the salt flats of the Rann.
[1] A team of local and US ornithologists[1] and soldiers of the Indian Border Security Force (BSF) who patrol the adjoining Rann of Kutch international border area of India with Pakistan have allegedly seen the light.
In modern science, it is generally accepted that most ignes fatui are caused by the oxidation of phosphine (PH3), diphosphane (P2H4), and methane (CH4).
Furthermore, phosphine produces phosphorus pentoxide as a by-product, which forms phosphoric acid upon contact with water vapor.