Left side
光 'light' — originally a person with fire above the head, the standard picture of luminance. Carries the meaning of
辉 directly: brilliance, splendour, radiance. The simplified
辉 cleverly swapped the original radical
火 for
光 itself, making the brightness theme explicit on the page. Sits in a tight luminance family with
耀 dazzle,
煌 bright,
烨 sparkle.
