If hundreds of thousands of suns rose up at once into the sky, they might [perhaps] resemble the radiance of the great being(Supreme Person Shri Krishna) in that universal form.
Purport
The universal form as described in earlier two verses contained unlimited faces all with different attributes spread in infinite space. This verse describes another fact about the universal form of Shri Krishna. The glare of the universal form thus unveiled by so much that it surpasses the radiance of thousands of suns rising at the same time.
