Highly polished 304 stainless steel housing. Ideal for use in boats and RV's as a ceiling light, courtesy light, task light, under cabinets, cockpits, headliners, and compartments. Clear Polycarbonate engineered lens optics provide uniform and wide angle illumination. Circuit board is completely sealed in epoxy to resist water, corrosion and vibration. LEDs feature super long life span of up to 50,000 hours. Dia. 4" LEDs 6 Blue