It's already been said here but what the LED really does is let you know if you have something you need to address NOW or if you can do it on your time. I carry a purse so my phone is in there a lot...if I'm going somewhere that I can't really be interrupted by my phone I'll put my purse down somewhere (or the phone if it's with me) and I can easily see from the flashing LED what I may have waiting. The only thing to warn about with Samsung and Light Flow, however, is that in order for it to change the LED color it requires those notifications to light up the screen, and the only ways to do this are to allow it to happen and it will honor your default screen-on time before it turns off, or allow light flow to control the length of time but then light flow will lock your phone and it will require your pin (or passcode or swipe)...it won't take a fingerprint. The developer is aware and it's a limitation within Android/Samsung...not him. And by the way, as far as developers go...he's AWESOME. He responds very quickly and takes the time to explain why something may or may not be working as expected etc. He's very responsive. I was having a crash issue and within a day he was back to me with an updated apk to try, which did in fact fix the problem.