Harvey(Hi Harvey) and I have talked about this, we tried these in most of our trucks when they came out... and we later removed them and replaced them with standard sealed units again... .
In the winters where we travel, the snow dust piles on the back of our flat beds and trucks... regular lights throw off enough heat to keep the snow and ice off in the winter and you can always see them... . For us it was more important to be seen in the winter... BTW - we've found that in less than 10 miles with the right wind, and snow the whole back of the truck can be and issue.....
Harvey is pulling in southern states where ice and snow is not a problem... . We also had problems with LED'S not drawing enough current and we'd get a lamp out dash indicator with the LED's.
I just changed an 05 over to a flat bed. . I should post a photo or two... . anyway... that's our point of view... You don't share where your from..... so I just needed to chime in...
Hope this helps...