Hi fellow photographers,
glad to know you like the photo. It was photographed in local T***CO store where they indeed use long fluorescent lines. I was also surprised by the effect but my explanation is that the bold lines were exposed when I stopped the cart for a minute, looking for some particular goods, whether on "main roads" or in "avenues" -- thus the both directions. I have just a partial explanation for the "DNA spiral" -- I remember I intentionally moved the cart this way at certain point, probably under a sort of spotlight (I think there are some), but I cannot recall exact conditions.
Regards,
Martin