There is no dimmer either, but i am happy with the brightness. They are quite bright and mimic sunlight well.

Grew microdwarf tomatoes without any issues from seedling until fruiting. I use these for my carnivorous plants that require a ton of light. I have 3 of them hooked up on a 10 gallon terrarium where the lights are about 10 inches above the plants.

Magnetic backs make them easy to install on metal racking. I just wish the linking chords were longer.

Overall very impressed and will be ordering more for my pothos. And everything is perfect.

These lights are perfect! These lights work magic! All in all, love them. Those are super strong! Very happy with these. These actually soften it some!

These lights are a jumbled mess of wires that are difficult to hang. They stay on just dimmer no matter what what i push to turn them off. Unable to center the light from shelf to shelf at 15in between each shelf.

Power supply shows that it's not even close to 300w worth of lighting. Specifications for the listing are a downright lie.