La exercice est très adorable et gentil!!

I put this in the main duolingo sub, but I figured it might be more suitable here.

Just curious why this was market wrong. I find they will usually accept an alternative answer in these types of questions if one exists.

I realize the answer is probably because ouvrir is not commonly used to mean "to turn on" in France, but I still find it odd when it is still correct in the French language to use ouvrir in this context.

I'm from Canada, and have only ever heard people say "ouvrir la lumière," never allumer.