Hey, that’s a cool observation! Those rainbow halos you’re seeing are mainly a play of diffraction and refraction—light splitting up into its spectrum as it passes through tiny imperfections or air pockets. In photobiomodulation, we usually lock onto very specific wavelengths, like 660 nm or 800 nm, and control the dose very precisely. So the perfect halos themselves aren’t directly useful, but the underlying physics can inspire new ways to shape light. Think about beam‑shaping optics or photonic crystals that can create tailored intensity profiles or guide light deeper into tissue. By engineering the spatial distribution of photons, we might hit target cells more efficiently, reducing scatter and improving absorption. It’s a bit like turning those beautiful halos into a toolbox: the diffraction patterns tell us how light can be molded, and that knowledge can help us design better therapeutic light delivery. Just keep the wavelengths and power densities in check—those tiny rainbow tricks don’t hurt, but the therapeutic effect depends on the right dose and depth!