The patterns are easy to attach and adjust. Very good product, durable and functional. Ideal for ambulances, not to be used as fog lights or daytime running lights, too bright and blurry. The image fills in at true 180*, it's just as bright no matter what angle you look at it - top, bottom, side, if you can see the lens at all it's bright. When flashed, is sure to attract the attention of other drivers day or night. Unfortunately, I installed them as fog lights, hoping that the pattern would be directed onto the roadway without disturbing other drivers, but that doesn't work.
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