I don't have a newer one to check right now, but on the Tx30 series they had both the ThinkLight and the newly-introduced backlit keyboard, with lighting cyclin

I don't have a newer one to check right now, but on the Tx30 series they had both the ThinkLight and the newly-introduced backlit keyboard, with lighting cycling from off - keyboard dim - keyboard bright - ThinkLight. ThinkWiki is unclear on its presence - The T460s is listed as a model with it, but the Tx50 models seem absent.