Is it really worth the extra cost and weight to have a bike light with a red light mode, or is this feature just a gimmick thats being pushed by manufacturers to make their products seem more appealing to commuters and road cyclists? I mean, whats the actual benefit of having a red light mode on a bike light, especially when you consider that most of us are already using rear lights that are visible from over a mile away? Is the idea that a red light mode will somehow make us more visible to motorists, or is it just a way to make our bikes look like theyre straight out of a sci-fi movie? And what about the whole increased visibility in low-light conditions argument - isnt that just a myth perpetuated by the bike industry to sell more lights? Im not convinced that a red light mode is anything more than a marketing gimmick, but Id love to hear from some of you who swear by this feature - whats the real benefit of having a red light mode on a bike light, and is it worth the extra cost and weight?