YOU SAID:
the lantern was brighter than its wall
INTO JAPANESE
ランタンは壁よりも明るかった
BACK INTO ENGLISH
Lanterns were brighter than walls
INTO JAPANESE
ランタンは壁よりも明るく
BACK INTO ENGLISH
Lanterns are brighter than walls
INTO JAPANESE
ランタンは壁よりも明るい
BACK INTO ENGLISH
Lanterns are brighter than walls
You've done this before, haven't you.