I recently got a nikon d3400 with 35mm 1.8. I want to get an upgrade lens thats good with low light. Should i get 50mm or sigma 17-50

I recently got a nikon d3400 with 35mm 1.8. I want to get an upgrade lens thats good with low light. Should i get 50mm or sigma 17-50

Read more: I recently got a nikon d3400 with 35mm 1.8. I want to get an upgrade lens thats good with low light. Should i get 50mm or sigma 17-50