https://www.lighting.philips.com/api/assets/v1/file/Signify/content/LP_CF_XUMCOL52_EU.en_AA.PROF.CF/Localized_commercial_leaflet_Blue___52__TL_TL_D_en_AA.pdf
Here's the leaflet of a random color 52 tube. Indeed, jaundice is one of the applications, but probably also just decorative blue light.