Lex's breakthrough took around 20 minutes. The moment it was completed, Lex was momentarily overwhelmed by the immense burst of information he started receiving, but quickly adapted. His senses had become infinitely more sensitive, to the point where on his skin, he could even feel the subtle vibration of the blood flowing through his veins. He could hear his own breathing like a gale and see everything in such detail that he could not comprehend it.
But the sensory overload lasted only a moment, for his brain quickly adapted, and as if he had been doing so his entire life, he started filtering out the information he didn't need subconsciously.