Rosnek LED Grow Light Clip, 2/3/4 Tubes USB/US Adapter Plant Growing Lamp, for Flowers Vegetables Plants Seedlings Growth

Dimming in percentage stage, adjustable to 20%-40%-60%-80%-100%. When starting by default, the dual-tube all work, press the switch key to adjust to single-tube work, then press again to end the work, and thus cycle! The lamp holder is a soft holder, and the lamp tube can rotate 360 degrees.