I was reading an article about an object 625 million LY away and I went wondering if the ligth does "decays" or "run out"  of energy sometime

i know the ligt and radio waves from distant stars reach very faintly to us most of it absorbed b the intrestelar media (dust etc.)

to create ligth you have to transfer energy to an electron in cuantic packets, so the energy that each photon have is limited rigth?

in a hypotetical infinite universe could the light travel forever?