usbcontrol
can interact with the USB controller.If you have a purely passive lamp, which has no electronics that's connected to the two USB data pins, and only uses the two USB power pins to get 5V using at most the minimum unmanaged power (which I think is 100 or 150mA, the details are lost in my brain), then there is nothing you can control. I think such devices do exist; whether they are USB standard conforming would be a question for a USB expert.