One advantage of the rope lights would be that they would make it easier to illuminate your entire darkroom. There is nothing quite as frustrating as having a safelight that forces you to stand only in certain places, because otherwise you find that you are blocking the light with your own body.

I note that the amber rope light at that "orangetree" link also features a "most beautiful and romantic warm glow". I can't say that I've ever worked in a darkroom that offered a "most beautiful and romantic warm glow" .