What is a synonym for bright?

The best synonym for "bright" depends on the context. Here are some options:

For light:

* Brilliant

* Luminous

* Radiant

* Glowing

* Resplendent

For intelligence:

* Clever

* Intelligent

* Sharp

* Astute

* Quick-witted

For color:

* Vivid

* Intense

* Saturated

* Bold

* Strong

For other meanings of "bright" (like cheerful):

* Cheerful

* Happy

* Joyful

* Optimistic

* Hopeful

Please provide more context about how you are using "bright" and I can give you a more specific synonym.