The on button is the one closest to the usb plug. The light is nice and bright and it comes on a telescopic handle that allows you to adjust the height. The plugs are usb, but they come with adapters.

I wish it had a timer but that’s a lot to ask for this price point. I usually keep it on until the powerbank goes dead and then swap it out with a charged one the next day. Timers allow you to put it on for 8; 16; or 18 hours. That annoys me a little ...  Read More

Definitely promotes growth and the price is really good. The telescopic pole is a nice touch. I have several plants in my office that were riding the struggle bus and decided to give these grow lights a try.