"This lamp would better light (up) the back of the room." Accepted.
... (myself, I would leave out "up," but I have not tried that.
"éclairerait" sounds like "éclairait" in both quick and slow audio versions.
I agree....the audios should be corrected
Actually I can hear the difference clearly even with the fast recording.
The voice at the top of this page says it quite clearly, but the newer voices used in the exercises don't enunciate the 'e' between the two 'r's, so the difference between éclairerait and éclairait is slight.
before I finished the final word (better, which would be correct) the system marked wrong. not ok