A light that turns on automatically when you enter a dark room is simply Comfort - and safety - pure. The burn time can be, among others, to just 10 seconds to adjust - the beam direction is also adjustable. Merely attaching (magnetically to a stick-on metal plates) is weakening slightly. Something can, however, change that - I just a piece of thread pulled through the battery compartment and the lamp like a picture hung. All in all, a useful aid.