Visswanathan Aidikesavan
Pure White Light is Arutperum Jyothi.
Arutperum jyothi arutperum jyothi

In Chitambalam is Arutperum Jyothi. The colour of light is White - Pure Consciousness. It is light of all lights. (Pure White light is God into expression in Sathya lok).

Poonambalam ( Sky of Golden light)  is below Chitambalam (Sky of pure white light). 

i.e. After crossing the Sky of Golden light is the Sky of White light. White light is the TOP MOST LIGHT BEYOND WHICH IS lightless INFINITE DIVINE VACUUM. ( Absolute God in Anami lok) 

Poonambalam or Chitambalam - Which is the top most sky?

Sky of CHITAMBALAM is the top most. It has The light of Consciousness - Pure White light.

Light on the Sanmargam flag: 

Sanmargam Flag has golden and white light. The meaning is crossing the Golden light is the inner most Self or Soul or God or Consciousness which is Pure White light. ( Arut Perum Jyothi)  This White light  in the flag is Arutperum Jothi, Ocean of love and mercy.

Conclusion :  Pure White Light is Arutperum Jyothi.