Actually much less cause it's definitive.
Question the source all you want, it's likely accurate.
Wiki To Love Ru
I highly doubt there is one. Anime News Network shows nothing as well as MyAnimeList.net.
If the series started as a game, or visual novel, and received a manga and anime, I highly doubt there will ever be a light novel. Normally if a series has a light novel they go to manga or anime, not to Visual Novel. Only some cases. I think Fate/Stay was
one of the only exceptions. And that started as a game. I think only the newer adaptations received light novels.
So unlikely. Though with a visual novel you can get all sorts of information that you'd be craving for. They're practically filled with the same content as a light novel. Just not as much narrative, obviously.