Super Bright Commercial Grade Solar Marine Warning Lamp Designed as a super bright LED warning light for marine or utility applications. This self-contained solar lamps features: Eighteen (18) internal LEDs for superior 360 degree lightingLarge 6 inch internal solar panel built-into the upper lamp surface – automatically charges during daylightPowered by a 4400 mAH internal battery pack (replaceable)Weatherproof and shock resistant design. IP65Mode of operation: Constant On or FLASHING (two flashes every two seconds)Selector switch on the lamp undersideViewable at distance of up to 2nm (varies by installation height and other issues)Expect up to 10 to 12 hours of performance if fully chargedOverall dimensions: 7" diameter at base; 7.25" height; 6" diameter at topNote that performance changes based on daytime sun angle (winter sun angle produces less charging in northern latitudes)Note: this lamp has both Constant On and Flashing modes. See our other listings for other solar warning lamps Available in Red, White, and Green LED colors (note that the domes are clear but the LEDs inside are colored. See our other listings for other colors and other styles and models of solar warning lamps.