I’ve had these bath toys for 2 months now and the lights in these are still glowing strong. Only the rocket light will eventually fade while my son takes his one hour bath about halfway through but it comes back full power the next day. I read the reviews of the light dimming and thought for less than $12, I can live with it even if I have to buy it every month because it beats those bath toys with openings that eventually have mold growth inside them which I absolutely hate. For the first month, I kept putting the paper that came on them back on at the end of bath time as I felt that would save the toy batteries so it wouldn’t die out but once the rocket started going out which I think was due to my toddler son chewing on it, I stopped giving myself more work and just put them up without reattaching the paper. So far, all the other toys stay lit except for the rocket that goes very dim midway through his bath every night since he chewed it up. Overall, I’m pleased with my purchase and how well these bath toys lights are shining as my son absolutely love them.