The Chinese, often, do not manufacture things, within tolerances, of our equipment designs.
I intend, to use, LEDs on exterior lights, Haven't thus far, as there is six, on each side, for taillights, in individual housings. They replaced one, some time ago, and the housing cracked. 282.00 per housing, from American Coach.
One reason, we want to change, is we're having head lights rewired and driving lights redone, so we can see, and expect electrical load to go up on the alternator, so counter that, with LEDs consuming less elsewhere.