A bit too fantasy, I think you would score some low there but anyhow, you managed to get past that
"As Ron moved away from the Goblet, he eyes were set on a dragon statue, so large taht his eyes couldnt reach, and a door below it, then a small witch like voice rang through the hall "Light Will defend you!" he took out his wand a cast a [b]lumous, a lumous maxima none worked, so he looked above the hall and just stared at the dragon, immediately he noted a small bowl that had no flame in it, but yet a oiled cloth in it, he must light it...
PS- The Challenge chamber is locked magically and hence you cannot use an acio charm!