@diametrijenesis@lgbtqia.space A neat trick with the DC ones.... The demo button is a battery pack connected to the same connector the transformer uses. Not enough to run them much, but... If you take that connector, and wire a USB cable to it (swipe one from a broken device!), you can then plug the lights in to a USB battery bank. Useful when the power is out, or take camping, or dimly light an unpowered space like an attic. They run a bit dimmer than on the transformer, but pretty close.