Is the viltrox af 50mm f 1 8 good in low light?

Here is what the site says about that.

From Viltrox AF 50mm f/1.8: Viltrox AF 50mm f/1.8: A prime lens by Viltrox for Full frame cameras, 50mm f/1.8. Specs - Maker: Viltrox - Focal length: 50mm (prime) - Maximum aperture: f/1.8 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 50mm. - On APS-C (Sony E): like 75mm on full frame; f/1.8 gives about the depth of field ...

From Viltrox AF 25mm f/1.7 Air: Viltrox AF 25mm f/1.7 Air: A prime lens by Viltrox for APS-C cameras, 25mm f/1.7. A cheap, light standard prime for APS-C.

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