How many lights could affect at an object at the same time

Hello,

In one place of my scene there is a large amount of light sources. And object moving there start to blink. When I decrease amount of light it blinks less. I wonder could it be because of amount of lights at one place? And how many lights could affect at an object at the same time?

If I remember correctly:

8 vertex lights

As many pixel lights as you set in the current quality setting (Edit > Project Settings > Quality)

It'll usually use the lights which give the highest light value to the object when choosing which to use