The problem with artificial lighting (Garry's Mod)

In short, the situation is like this. Previously, a long time ago, before a heap of updates on the garis mod, I played it on maximum settings and did not complain. But soon, the garis mod I gave up. And one day, I decided to come back. Returned, decided to do a pose, when suddenly, turning on the lantern, I got into the world slide show, at a speed of 0.25. With other lighting that is created by the player is the same.
Can someone help with that?