sunlight
晛 centers on sunlight itself, specifically the appearance or emergence of sunshine. It is a rare character whose meaning is limited to this single idea of visible sunlight.
晛 combines 日 (sun) with 見 (see), suggesting the idea of sunlight becoming visible. The exact historical development is uncertain, but the component structure points to the appearance of sunshine.
The sun 日 is seen 見: when you can see the sun clearly, sunlight appears. Picture the moment the sun breaks through the clouds and becomes visible.
For ケン, imagine Ken (a person's name) standing in the sunlight, squinting as the sun appears: Ken -> ケン, and the sunlight shines on him.