ChoiceQuill is reader-supported. When you buy through links on this page, we may earn a commission. You pay the same price either way.
Hydroelectric plants make electricity from the movement of flowing water. Take away the flow, and water is not supposed to produce any power at all.
Planto proves otherwise. This little lamp runs on water that simply sits in a tank.
A Lamp With No Cord and No Batteries
The maker bills Planto as the first water-powered lamp in the world. It gives off the soft, accent-style light you would expect from any table lamp at home.
The big difference is how it gets its energy. There are no batteries and no plug for a wall outlet.
You simply pour water into the central chamber, and the lamp turns that water into electricity on its own. Really.
Shape, Handle and Plant Pot
On the outside, Planto is a compact desk lamp with a sleek, stylish look. It has a shapely handle, a central compartment built to hold water and a plant pot that comes in the box.
The pot can stay empty if you do not want to grow anything. It does appear to double as the power switch: turning it switches the lamp on and off, so it needs to stay where it is.
Maybe you want to grow a small indoor plant, such as a mini hydroponic garden. In that case, the design waters it automatically from the chamber.
The lamp’s full-spectrum LED array can also act as a grow light to help the plant thrive.
How Water Becomes Light
The plant is only a side benefit of filling the chamber. The main job of the water is to power the LED lights.
So how does that work? Inside the lamp sits a module called the HydroVolt Core. It contains aluminum parts that react when they touch both water and air.
That slow chemical reaction releases electrons. A graphene component collects the energy from those electrons and passes it to the lamp, so the lights come on without batteries or a wall connection.
The company also promises free replacement of the HydroVolt Core for life. If yours ever stops working, a new one goes in at no charge.
Brightness, Splashes and Refills
You can adjust both brightness and color temperature from the companion app. That lets you match the light to the mood of your space.
Planto is IPX4-rated, so splashes and spills while filling the tank are nothing to worry about. That makes refilling easy.
The company says a single tank of water lasts from a few days up to a week, based on how bright you like it. When the water runs low, the light dims on its own to let you know.
Cleaning the Tank
If the water tank gets dirty, the company sells a HydroVolt Booster cleaner. It also says a blend of water, vinegar and baking soda is safe to use, in case you have those at home.
Ryan Caldwell
Taking shortcuts with facts isn't an option when it comes to building real reader trust. I lean heavily into thorough planning and structural accuracy because I know how annoying it is to finish an article and still be left with unanswered questions.