Here’s another one I’d like to do homebrew version of…Emergency Afterglow Lighting combines scotopic phosphor blend with non-radioactive after-glow phosphor blend to provide uninterrupted illumination in critical interior areas during low-light and no-power conditions. Even if bulb breaks, glass pieces will continue to glow up to 12 hr after power goes off. This 100% bomb-proof fluorescent lighting can also be detached and used as portable emergency light source. Link.