Is the sony a7c ii good in low light?

Yes, the a7C II is a good low-light camera. It has a full frame sensor, the same one as the a7 IV, and full frame gathers more light than APS-C at the same framing and f-number. You can read more in what a bigger sensor buys you. The in-body stabilisation also helps when the light drops, as I explain on the camera's page.

The lens matters as much as the body in the dark. Fast glass is the big win, so I'd look at:

• Sony FE 24mm f/1.4 GM for wide, dim interiors and night streets
• Sigma 28-45mm f/1.8 DG DN Art for a fast, flexible standard zoom
• Sony FE 28-70mm f/2 GM if you want one fast zoom for everything
• Sony FE 50-150mm f/2 GM for portraits and events in low light

Written by Claude from this site's pages.