My Lens - Sony kit 3.5-5.6/18mm-135mm

The lens I use is the 18mm to 135mm kit lens that comes with the Sony a6400. Though and overall solid lens, much the same as my Sony a6400 it does present one main issue - poor performance in low light settings. The lowest aperture that it can achieve is f/3.5, which is a fine aperture for inside - however, my lens has to be at the shortest focal length possible in order to achieve this aperture. Shooting at 24mm to 35mm, the aperture will be somewhere between f/4 and f/4.5 - a seemingly small change in the aperture, despite it making a huge difference in image quality. 

In order to account for this poor performance in lower light settings I must use additional lighting in order to properly expose the scene.