Indoor Office Desk USB LED Plant Grow Light<br /> <br /> <br /> Description:<br /><br /> The influence of different wavelengths of light on plant photosynthesis is different.<br /><br /> Spectral range effects on plant physiology:<br /><br /> 400nm-520nm(blue):chlorophyll and carotenoid absorption proportion is the largest,the biggest influence on photosynthesis.<br /><br /> 610nm-720nm(red):chlorophyll absorption rate is low,have significant effects on photosynthesis and light cycle effect.<br /><br />  <br /><br /> Features:<br /><br /> Colors:red + blue<br /><br /> Interface:5v USB<br /><br /> Usb cable length:1.2m<br /><br /> Connecting pipe height:40cm<br /><br />  <br /><br /> Package included: <br /><br /> 1 X led plant grow light