installed on an f150, they are bright and function as described in the listing. i think they look great. i cant explain why others have had a tough time getting the adhesive to stick properly as i did not experience this problem at all. i cleaned the surface as instructed and then wiped it with provided alcohol wipes and when i removed the backing and pressed light strip i found it to be more of a get it right the first time because once applied youre not going to be able to remove it problem than a it wont stick problem. i live in NY with its weather and winter and ive not has a single problem since the day i installed them. hope this helps.