About this article. [High Brightness and Spot Beam]Adopts 6 3W red LED chips directly, 18W 1800 lumens each piece, 36W 3600 lumens each pair. 30 degree spot beam, provides additional illumination range, allowing you to see the front more clearly in dark night or foggy weather without disturbing your coming vihecles; Size: 94mm x 80mm x 65mm; 3.7 x 3.15 x 2.56 inch [Heat Efficient Diation]This 18W LED light bar has heavy duty 6063 aluminum alloy housing, cooling fins to maximize surface area for optimal cooling and extend the life of the bar. LED light up to 50,000 hours. With Adjustable Bottom Sliding Brackets: The 18W light bar is equipped with necessary mounting adjustable mounting brackets, easy to install and flexible (could install the brackets inward or outward, 30 degree angle adjustable), making it easy to install.