A simple and easy solution to dimming the Sangean HDT-1 Display. 

You'll get three pre-cut cling films - one each of VLT* 20%, 35%, and 50% - to allow you to find the brightness that works best for you. 

Pre-cut to fit exactly - Installs in seconds - Here is a short how-to video: https://youtu.be/Wb5Jsh1QxRs

* VLT = Visible Light Transmission: The percentage of visible light transmitted through the film. So, VLT 35% will allow 35% of the light to pass through. The lower the number, the less light will pass through, so the darker the film.