Lamp light diffuser

My office/workshop is not meant to be a photography set. The lighting isn't suited to product beauty shots, yet photos still happen in here. Part of this is that I'm more photosensitive than your average maker and will happily work away in my dark cave. But I want better photos, so I decided to try and improve the lighting situation without splashing out hundreds on professional gear (that won't fit in here anyway).

( Details )

Diffusion ring fitted to lamp
Photo by chebe

( Before and After )