@Pco @yantor3d yeah in the Netherlands you have strict laws about the placement of lights. You are only allowed to have them shine to the front and back. Reflectors have a bit more freedom, but lights in wheels shining to the sides are not allowed.
I saw someone mention something about using induction to light them, it might work depending on how much energy you need: https://www.beastybike.nl/magnetische-verlichting/1596-reelight-sl150-magnetische-fietsverlichtingsset.html
