Sony explains why the Dualshock 4 lightbar exists.

[WagnerPaiva]

Nem said:

I thought it was gonna be a better explanation. That doesnt explain why it has to be on all the time. If anything it supports the idea that it doesnt, because the Morpheus is an acessory that isnt yet available.

I still choose to believe a more likely explanation: Ego's. Some guy had this idea that he thought was amazing and the others let him run with it. The light bar is a poor idea and it should be removed from the controlled with due haste. It serves no practical purpose. Even if its because of Morpheus. What does it matter? You will have a visor on your face. You're not even gonna see that light!

So i believe this is a technical issue that was completely blindsided because of the Ego behind this idea. No one wanted to take this person on and he wants to be able to say that his touch is there in the system.

I think it is for the PSEYE to see, not the player, since it is for tracking and all. To be honest, I like the light, it is kinda fun to me, but I see how one could think it is stupid, I am just easily amused I guess.