Descriptive writing: what would be the best adjective for "bright day" and "sleep"?

It was blue-bright day. The sun gushing its light causing the flash to wander through the window, giving a feel of living in a shining bright diamond. (what adjective would be the best to describe a bright feeling) In the cream-beige room was a teacher teaching lecturing in front of the class. The continuous murmurings would latch through my ears and gave me a goodnight sleep even the sun was dead alive. There were nothing but a subdued hankering for the eraser game.