Lighting advice: Video & Vlogs

[limpsfield]

As per the title. I do some weekly vlogging for a third party company. Part of the vid is me talking to camera. My office desk is next to a large window but as winter draws in the light quality is diminishing.

What recommendations do you have for a straightforward natural lighting solution, for a non-techy please? Budget up to a few hundred quid but always happy to spend less.

Thanks.