YOU SAID:
the sun shined brighter when she was here
INTO JAPANESE
彼女がここにいたとき、太陽はより明るく輝いていた
BACK INTO ENGLISH
The sun was shining brighter when she was here
INTO JAPANESE
彼女がここにいたとき、太陽はもっと明るく輝いていた
BACK INTO ENGLISH
The sun was shining brighter when she was here
That didn't even make that much sense in English.