Various kinds of lights manifests in during meditation owing to concentration. In the beginning, a bright white light, the size of a pin’s point will appear in the forehead in the six chakra, the space between the two eyebrows, which corresponds tentatively to the six chakra of the astral body. you will notice, when the eyes are closed,different colored lights,white,yellow,red smoky,blue,green,mixed lights, flashes like lightning, like fire burning char-coal, fire-flies,moon,sun,starts.These lights appears in the mental space,chidakas. Theses all the light belong to their elements like( earth,water,fire,air,sky,)and they have their own special colours,yellow,white,red,smoky and blue. The yellow and white lights are very commonly seen, Red and blue lights are rarely noticeable. Frequently there is a combination of white and yellow lights. In the beginning, small balls of white lights float about before the mind’s eye. When you first observe this, be assured that the mind is becoming more steady and that you are progressing in concentration. After some months, the size of the light will increase and you will see a full blaze of white light, bigger than the sun. In the beginning, theses lights are not steady; they come and disappear immediately.They flash out from above the forehead and from the sides. They cause peculiar sensation of the extreme joy and happiness and there is an intense desire for a vision of these lights. When you have steady and systematic practice of two or three hours in the morning and two to three hours at night, theses lights appears more frequently and remain steadily for long time, the vision of the lights is a great encouragement in meditation practice. It impels you to stick steadily to meditation .it give you strong faith also in super physical matters. The appearance of the light denotes that you are transcending the physical consciousness. You are in a semi- conscious state when the light appears. You are the between two planes. You must not shake the body when these lights manifest. You must be perfectly steady in the sitting pose. You should breathe very, very slowly and it will be remain till long time.