My surprise is not so much in the way Lidl managed to win, but how they managed to gain a trademark for a yellow disk on a blue background in the first place.

Has no-one looked at the sky recently?

I suppose it was the fiery red ring which cannot be seen with the naked eye that tipped the balance in their favour.

Who is she who looks forth as the morning,
Fair as the moon,
Clear as the sun,
Awesome as an army with banners?
The Song of Songs

The heavens declare the glory of God; and the firmament shows his handiwork.
Day unto day utters speech, and night unto night reveals knowledge.
There is no speech nor language where their voice is not heard.
Their voice has gone out through all the earth, and their words to the end of the world.

In them he has set a tabernacle for the sun, which is like a bridegroom coming out of his chamber, and rejoices like a strong man to run its race.
Its rising is from one end of heaven, and its circuit to the other end; and there is nothing hidden from its heat.
Psalm 19