Translation of "lightness" into Spanish

I can't read here. What bothers me is the light which is too bright.

No puedo leer aquí. El exceso de luminosidad me molesta.

And in the clear light of day, they'll both see how ridiculous it is.

Con la claridad del día, ambos verán lo ridículo que es.

You have the energy of a bullet, but the lightness of a depressed elephant.

Tienes la energía de una bala, pero la ligereza de un elefante deprimente.