It's okay for the money. It's just cheaply made. I'm afraid the sun will burn it out very soon. As for the brightness of the LED, it's moderate!

They look good, I haven't put them on the trailer yet, I will return.
The wiring is in the four cables that the kit has: yellow for flash, red for brake, blue for negative, and black for positive. There is a slight difference when you press the brake with the red one, it stands out better during the day and at night