No. Riboflavin fluoresces, which means that it needs the energy from a UV light/black light in order to get its molecules up and jumping. If you don't have a black light already, I recommend these u003ca href=u0022https://amzn.to/3cCNC8Gu0022 target=u0022_blanku0022 rel=u0022noreferrer noopener sponsored nofollowu0022u003eblack light barsu003c/au003e. They worked great for our last halloween party.