I use the USB led light that plugs into my laptop port and absolutely LOVE its functionality! This is a truly useful item for late night or wee hours of the morning computer work or surfing the web when you don’t want to turn on full room lights and disturb others.
I cannot say how handy this little led light is! It lights up your keyboard perfectly and you can adjust the moveable arm to direct it exactly where you need the light to shine. It shines down on the keyboard without spreading out to other areas and, reiterating, keeps your work on the computer from disturbing others.