When putting the car in the garage at night in the back, the width was quite narrow, so I stuck it to the pillar so that the position of the pillar was easy to understand, but I thought that yellow is more fluorescent or luminescentish yellow That was no good. In the night it is hard to see with only the light of the tail lamp. Also, although it has been over a year, it came warping a little and turned up. This is going to be a disappointing item.
I do not know whether it is good to put it on the ceiling where the head is not hit.
It was still better if double-sided tape was attached to the back. It is difficult to paste on curved surfaces such as corners of steel materials. I think that it is good for use wound on a pole etc. Among similar things, the price was cheap. I think that it is cheap when small amount is good.