You simply attach your head torch to the bottom of the bag using the special attachment system and you get a pleasant diffused light to add an air of, shall we say, romance to your camping expeditions.
The bag can also be used as a waterproof stuff sac or for food storage, both of which are important when you’re camping. A 'diffused ambient light' isn’t, of course, but if it makes your camping experience more pleasant for little extra weight or expense, why not?