You can buy radioactive exit signs. https://www.emergencylights.net/collections/self-luminous?gclid=Cj0KCQjw08aYBhDlARIsAA_gb0fEvKtAiYwBUzcod1GCJL0YLhx-XfMnD6n

You can buy radioactive exit signs. https://www.emergencylights.net/collections/self-luminous?gclid=Cj0KCQjw08aYBhDlARIsAA_gb0fEvKtAiYwBUzcod1GCJL0YLhx-XfMnD6nhh-wkx3MPcj0MpQnd90UaAsaMEALw_wcB https://www.emergencylights.net/collections/self-luminous?gc... They aren’t generating electricity though.