Normally there is LED lights or lamp on solar power bank, so is our MIQ-S01 solar power bank.
You can control the LED lights brightness on power bank by the button itself.
There are also many other LED lights without battery, which needs to be powered by other power banks or AC power adapter.
Power banks can provide power to make LED lights on, but it can not control the brightness of LED lights. Then we need an adjustbale USB ports with controller and button to change the brightness of lamps. Below is the pictures during our testing.
Collect the LED lights with power bank by this special cable. LED lights would be in the brightest station when you press the power button on cable. Press the down arrow button to make LED become more and more weaker.