Note This operation requires a condition of uninterruptible power. Features: -- Dual-timer, you only need to set the timer just once. -- 5 Dimmable Luminance Modes. -- 3 options to choose the lighting quantity and Red/Blue-Ray switch. -- Made of Aluminum & PVC, lightweight and durable with good heat dissipation. -- Low Consumption and Environment Friendly. -- IP66 waterproof, no need to turn it off when watering the plants. -- 360° flexible goosenecks make it able to adjust any direction or the lighting area. -- With an adjustable clip which max to 2.5 inch for you to fix it on most place stably. -- 3 timer modes - 4 hours, 8 hours and 12 hours. --- (1)Choose 4 hours timer , the grow light will automatically turn off after 4 hours using and turn on again after 20 hours. --- (2 )Choose 8 hours timer , the grow light will automatically turn off after 8 hours using and turn on again after 16 hours. --- (3)Choose 12 hours timer , the grow light will automatically turn off after 12 hours using and turn on again after 12 hours. BLUE LIGHT influences the formation of chlorophyll, enabling the plant to intake more energy. Plants that receive plenty of blue light grow with strong, healthy stems and leaves. This process is called photomorphogenesis. RED LIGHT contributes to the optimal development. Its essential to a plants early life for seed germination, root growth, and bulb development. It also makes the plant yield better results when flowering. Product Type: LED Grow Light. LED Quantity Each Lamp: 78 Pcs (54 Red & 24 Blue). Material: Aluminum & PVC. Power: 1 Head (15W) / 2 Heads (30W) / 3 Heads (45W). Input Voltage: 5V. Input Current: 2A. Wavelength: (Red: 620-630nm / Blue: 460-470nm). Working Temperature: -20°~40°. Life Time: 50000 hours. Lighting Range: 2-3 square meters. Suitable Distance from Lamp to Plant: 0.98-3.98 ft. Size: 9.5cm(diameter)*1.5cm(high)* 28.5cm(length)/3.74 *0.59*11.22 "