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Top performance and daisy chain feature: VIPARSPECTRA improved XS1500 grow lamp with more scientific Samsung LM301B diode distribution to achieve the best PAR distribution and the highest light penetration for maximised plant yield. The Daisy Chain feature allows you to connect up to 20(pcs) XS1500 grow lights: commercial cultivation, horizontal and vertical cultivation, greenhouse, hydroponics etc. Optimal full spectrum and flexible dimmer: the lamp is equipped with 3000K, 5000K, 660nm and 730nm infrared. This ensures that your plants are supplied with all the light they need for their optimal development. The red and IR infrared light can accelerate the flowering time and increase the yield. It also has its own control for dimming the light, so you can adjust the light intensity to the respective growth phase as you like. Quiet operation and solid construction: no fans, no noise. The ideal cooling is achieved thanks to a large aluminium heat sink. Thanks to MEANWELL ELG Series drivers, the lamp scores points with high safety standards, a high PAR output and a long service life. A high PAR output accelerates the growth processes of the plant and increases the yield, which is finally noticeable on the electricity bill. HIGH SURFACE COVERAGE & LESS ENERGY CONSUMPTION: Comparable to traditional 400W HPS/MH lamps with only 150W energy consumption, resulting in a 50% higher yield and lower energy costs. Perfect for a surface coverage of 90 x 90 cm at a height of 45 cm during the growth phase and 60 x 60 cm at a height of 35 cm during the flowering phase. Remember to always adjust the brightness and height of the lamp to the wishes of the plant. REALLY THE BEST SUPPORT: we offer you 24 months warranty and 30 days money back guarantee. Professional advice, friendly customer service and excellent after-sale service contribute to a good buying experience and help your plants grow better. If you have any questions, we are always there for you.