EDIT: The aforementioned flower already has a glow (presumably from the .NIF). I just want to expand on that glow so that the flower lights up its surroundings.
EDIT 2: I just noticed the http://www.gamesas.com/index.php?/topic/1169276-how-do-i-make-a-creature-nif-emit-light/. Evidently I can only use items in the 'light' category and the light spell effect if I want to emit light. But how?