For CCFL getting the light on can be as simple as 3.3V, DC-in given by the laptop’s charger, and GND. Probing the power leads on the CCFL driver should tell you which potential goes where.

Dim or reduce the brightness of computer screen. ... In Windows 10 you can open Settings > System > Display and change the brightness here and also set Night Light if you wish.

You don't need to be a YouTuber to benefit from a clip-on laptop light, which improves the appearance of all of your video calls. Best Laptop Lights 2021: Best Clip-on Lights for Video on Amazon ...