Traditional sources recommend using shined when the verb has an object and shone when it does not:
The young man shined his car’s headlights until they gleamed. (object)
The light shone brightly. (no object)
In addition ‘shined’ is only acceptable as the past tense when you mean “polished”.
He shined his shoes.
not
The sun shined.
So…
The sun shone brightly while I shined my shoes.