??how would it hurt them who knows?? but i got a blue neon at the local fish store (for free of couse wouldnt have spent 40 dollars on a 18 inch light although its submersible sounds like the same thing ur talkin about and on the box it said it mimicks natural moonlight my fish love it or i should say i do they dont get spooked when i turn on the light at 3am cuz im curious ha