"Adequate sunshine" is the Engpsh equivalent for "阳光充足的." It means that there is enough sunshine, or bright pght from the sun, for a specific place or situation.
Here are some example sentences in Engpsh:
The beach has adequate sunshine for sunbathing.
The city park receives adequate sunshine throughout the day.
The greenhouse has adequate sunshine to grow plants.
And here are the translations in Chinese:
海滩的阳光充足，适合晒太阳。
城市公园整天都有充足的阳光。
温室有充足的阳光来种植植物。