They perfectly clamp to every surface i've tried them on. They are very sturdy and clip on yo almost anything. Flexible and can be clipped anywhere. Clamp very strong and keeps light firm.

The timer is an awesome feature, it has 3 settings 3,6 and 9 hours. The only drawback is that the feature * are confusing. Output of heat from the lights is monitored to prevent and burning to your plants.

They also appear to be providing ample additional light to some smaller potted plants high up on a bakers rack as well. This light give great light to my plants and they are growing and blooming. Month of use at 12 hrs per day.

The timer works great and the plants are germinating like crazy. Hope it works to perk up some of my plants! Use for many different kinds of plants. There was nothing deceptive at all in the description.

Even on the brightest adjustment, the light is not enough. It's mid-winter, with no direct sunlight in my windows, so i was hoping to imitate the sun. However this product generates loud radio frequency interference (rfi) noise spikes every 40 khz.

This thing is awesome! Very pleased with this purchase. I love that i re-potted my plants in the dead of winter and they are thriving so well like they are outside and it's not summertime.

The timer works really well in 3 different settings. Sometimes the timer needs to be reset when there is a power outage. I can see the the plants have perked up in the day that i have had it - so it seems to be giving them what they need.

The clip is very strong and sturdy. The base is a clip so i can clip it to my shelves and place the light rods where i need them that day.