Extremely bright and extremely effective. However, when you order the unit with the optional flashing takedowns, the 10-15 minute install time becomes more like a few hours with lots of wires to run. The takedown option takes the simple cigarette lighter plug and requires a switch box – which involves taking the dash apart to run wires and find power. Now that the installation is done, the takedowns WERE worth it. However, I had it to do over again, I probably would have ordered it without the take down option. But, they are nice. The video speaks for itself. If the HTML code does not translate, just cut and paste. The video is the best review I can offer. There is zero (0) flashback with the adjustable shield. At night, except for the fact the signs are flashing back at you, you won’t even realize the unit is activated. The intersections ARE clear when you get there. This one is installed on a 2012 Jeep Grand Cherokee. \r \r http://www.youtube.com/watch?v=dxKKljLdhbQ\r \r Like I said, if the HTML doesn't translate, cut and paste. The video speaks for itself.