Is bright and radiant the same?

Excuse me, but could you elaborate on the distinction between "bright" and "radiant"? Are they interchangeable terms, or do they carry subtly different meanings in the context of light, color, or personality? For instance, does "bright" primarily convey a sense of intense illumination or clarity, while "radiant" might suggest an almost ethereal glow or inner beauty that shines forth? I'm genuinely curious about the nuances that might separate these two adjectives in various applications.