While searching for some Japanese market fluorescent tubes to add to my collection, I discovered that they have some fluorescent tubes that have an afterglow feature that allows the lamp to faintly glow after a power cut, which can help minimize the likelihood of accidents associated with walking in complete darkness. I find them pretty interesting since they have that unique feature that is not found on any other fluorescent tube in the world.
Here is a PDF that details this information:
https://www.hotalux.com/library/_140__187__141_s/english/products/pdf/lamp.pdfI am in the process of obtaining some of these afterglow fluorescent tubes for my collection!!!!