ALPHA 1200X Billboard Light // Security Light // Flood Light for Warehouse, Road Signs, Regulatory Signs, Waterproof Weatherproof IP65 Three levels user-defined power setting: High-Normal-Low for 1500-500-150 lumen brightness, last 2-7-12 hours. Auto on/off during dusk and dawn. 180pcs white LED producing neutral white beam for optimum area coverage. 12W solar panel is made of industrial grade high efficiency solar cell, tempered glass, and anodized aluminum frame. Equipped with Lithium battery for longer charging cycle against conventional battery. Cast iron light fixture with tempered glass, built for durability and good heat dissipation when used at high power setting. Cable length between solar panel and light is 5m (16ft). Be sure to charge ALPHA 1200X in full sun for 8 hours before use. When ALPHA 1200X does not perform according to setting, please turn off the system and charge in full sun for 3 days before use. Low battery power prohibits system to function normally.