1.A: PCB chip board. B: Copper thermal conductive pad. C: Gold plated electrical contacts.2.Main selected the highest high-tech LEDs from the best LED manufacturers.3.We invest heavily in optical science, we have developed several patented optics that optimize the total flux and its sufficiency. 4.A: Impact resistant polycarbonate lens that will never yellow. B: Custom molded synthetic polymer gaskets create a 100% water and dust proof seal. C: GORE Pressure Equalization Vent 5.A: High quality polyester coating extruded housings treated with anti-corrosion polyester powder coating and Drylac UV protection. B: Corrosion-resistant chrome-plated 304 stainless steel hardware. REVOLUTIONARY: Compared to most work lights on the market, our dual 260W LED work lights offer both a low beam and a high beam! UNIQUE in auxiliary work lighting: Allowing you to see clearly to the left, right, and rear PROUDLY UPGRADED: Stunning 4-inch square LED spotlights break away from previous rows EXTRA