Is it ever a good idea to allow a child to sleep with the TV on all night, every night?

I ask this because my Goddaughter (8 years-old) claims to not be able to sleep unless she can have a television on in her room all night. My first response is ABSOLUTELY NOT! I think that’s HORRIBLE sleep hygiene (for lack of better description). Especially when I hear her mother complain that she wakes the rest of the household up 3 to 4 times each night.

I do not want to leave any televisions on all night for any reason – I think it would disturb everyone else’s sleep and don’t think it’s doing her any good. But her mother insists that it’s the only thing that works.

Can I stick to my guns when she spends the night here without it seeming cruel? Is there a reason to endorse this need?