2pcs / pair 120W PCB Panel with 3000K+5000K+660nm+UV+IR<br> This panel is designed base on the Samsung high efficiency LM281B+ SMD 2835 LEDs(176pcs 3000K+72pcs 5000K), mixed 660nm Red LEDs (32pcs) and less UR /IR LEDs (4pcs each).<br> This combination will be suitable for the entire growth process of most plants from seeding, germination, flowering to fruiting.<br> The advantage of 3000K has plenty blue for full cycle, it will be very good if you want to make veg/flower rooms. <br>The advantage of of 5000K for veg is that your get tighter internodes, which gives you a more balanced distribution of light .<br> Red light (660nm) Does its best work in the flowering phase.<br> A higher intensity of red promotes a higher yield.<br> UV has been shown to increase the amounts of plants. But no need high power.<br> Far IR (730nm) light is made up of hot wavelengths.<br> This type of IR light is used in grow lighting to help plants bloom and thrive.<br> ( Please note this light is Invisible ) Power Driver to Use Plese check the spec printed on the PCB board: 48V/900mA~2700mA.<br> So we should use a power driver which the output Voltage cover 48V ( 40~48V is ok) and output Current cover 900~2700mA.<br> ( Working at 900mA will have the lowest brightness and power, 2700mA will have the max brightness and power).<br> If we connect 2pcs PCB boards in parallel connection, voltage no change, but the power driver should have double output Current (900~2700mA * 2) to make it work.<br> If we connect 3pcs / 4pcs / 5pcs in parallel connection will be the same rule as above.<br> Recommend Power Driver for 120W PCB board - Meanwell HLG-120H-48 or XLG-150-H-AB Recommend Power Driver for 120W PCB board - Meanwell HLG-240H-48