Will not impede on light output, perfect for offroad enthusiast. Protect LED work light from scratches,dust,gravels and other outer damage. Block the light output,keep your vehicle street legal in certain states. Snap-on design,tight enough not to fall off. Easy to put on and remove in seconds. According to the length of your Light bar to decide to the number of pieces you need to buy. Note:The width of your light bar must be 3inch. The off-road light bar lens cover is the to add style and protection to your lighting setup. These lens cover are made of durable polycarbonate plastic snaps on and off of the light bars with ease and are available in colors to suit your preference. Product is great prptection for LED work lights/light bar lens from off road damage! Professional Installation is Highly Recommended as we do not have technicians on site to further assist. Why not one big cover? Having multiple piece covers helps in many ways. One great advantage is ease of storage. It's much easier to securely and safely store 3 smaller pieces vs one large 20inch cover. You can also change out the covers to enhance the lights features. Example is using Amber and Clear covers together on one light. Colour: black Material: PC Package Contents: 2 * 6inch Lens Covers 5 * 8inch Lens Covers (Led light bar is not included.) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.