It's a particle and a wave depending on how you look at it. Light is not just a quantum, not just a packet of probabilities. Light is also a qualum. It contains both quantity and quality, so you have both a quantum and qualum aspect. Qualum mechanics is something we're inventing here.
Nobody knows that yet.
When we look at light in quantum mechanics, we can look at quantity in two ways. We can describe its mass and we can describe its energy. But if we want to get at qualum mechanics, we have to look at it from a temporal sense, what's going on in terms of process. When we look at process, we can look at the spiral. We can say this is an ongoing process because it's not just a projection of repeating item in one dimension.