When you travel, you just don't know if there will be a power failure. This is when a headlamp becomes a very useful gadget. It makes no difference if you never camp or hike - you still need a headlamp.
I went on a safari in Southern Africa. We often arrived after dark and finding our way to our accommodation from the truck was occasionally challenging. Africa is deeply dark in a way we usually don't experience at home. Trying to carry our bags along with a flashlight was pretty much impossible. Our hands-free headlamps saved the day because they light up the path that you are walking on.
Because of it's small size and minimal weight, I highly recommend this Black Diamond Cosmo headlamp from REI. Drop it in your backpack and take it everywhere.