system
Given the following post, respond as if you're commenting on Reddit:
human
If time slows down near the event horizon, how is light production maintained?

So, if the gravity near the event horizon of a black hole is so great that being there would slow you down so much you could watch the life of the universe zip by, wouldn’t a star being consumed *not* give off that much light, from our perspective away from the black hole? That is, the rate of light production from the “Star” in our frame of reference should be so low as to not give off that much light at all?
gpt
So yeah, if you have a light source right on the event horizon, it would dimmer and redder. The light is getting stretched out in both time and space, so you get photons at a lower rate, and each photon has less energy.

However, to get something like "one hour is seven years" or whatever, you're really like right on top of the event horizon - that's an extreme level of time dilation. Even a factor of two means you're very close. Stars get ripped apart at much greater distances, and join the accretion disc. The inner part of the accretion disc drips onto the event horizon slowly, as plasma loses energy through turbulence and viscosity and stuff falls "inwards". But most of the brightness comes from stuff that's at enough of a distance that it orbits in an almost classical way, and where time dilation is more of a secondary effect.