Sterno See ItWhy have emergency lighting? First off, let’s look at why you should plan ahead when it comes to emergency lighting. Have backups to the backupsAccording to Carrillo, “A layered approach to emergency lighting is essential.”That means equipping your home with multiple lighting elements that provide light in different ways. DEWALT 20V MAX LED Work Light You can use the same batteries that run your power tools to provide light. Final thoughts on emergency lightingIn the end, an effective emergency lighting array is pretty straightforward.