No, there is no way to get missed notifications through an led flash on any ios device. They don't come with led's behind the screen like android devices. One of the biggest things I miss about my S4. What dedzdedz is referring to is the camera flash, but that only happens when you initially get the notification, after that you have to have reminders set to on, or just activate the screen to see if there are any missed notifications.
Apple dropped the ball on this one.