Crazy $2 led USB lights!

[Moab]

I got these via AliExpress for less than $2 each. Just search "led light". Maybe even far less than that. They come as a circuit board and you snap each light off the circuit board. They plug into any USB port. This batch even came with a USB c to USB adapter iirc. If not, they are super cheap in AliExpress too. That way you can plug them into a phone too. They are super tiny, super lightweight, and very bright. Second pic is of it plugged into my laptop.

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[majorhavoc]

These would be handy to duct tape to any power bank that doesn't have a built in flashlight feature. I don't know how efficient these little usb lights are but I bet even a small capacity power bank could run them for hours, if not days.

[EBuff75]

I've got some similar lights that I keep in my vehicles and bags.  I went over them, along with some other USB lights, in this thread. 

[Raptor]

I have a few like these. They are cheap and bright. They work on anything that has a usb port. A tv, a laptop, a car, etc.

I am sure we all have long usb cords lying around. They work great with those to provide some flexibility.

I keep a power bank in my brief case for my phone and I have one of these lights that turns the power bank into a long running light. 

Just for giggles I plugged one into a 20000 mah power bank and let it run. In 24 hours the light was still on and the bank had 2 of the 4 power lights illuminated.