I wanted to add cab lights to my '21 5th gen and initially tried going the route of the factory cab lights through the dealer but that ended as soon as I realized none of the 4 local dealers could be bothered to return my calls. In the end I decided to try the Recon's and bought the 19-21 fresh install only with the smoked lens in white (SKU:264345WHBK) hoping that mine wouldn't have the same condensation issues mentioned above. The only downside so far is that the kit came with zero instructions and no template (the online guide isn't to scale but it does tell you roughly where the lights should be placed. I did the install this past weekend; for anyone interested, I put together a guide on my YouTube channel here:
The very day I finished installing everything, we had aa pretty large storm hit and so far (finger's crossed) I haven't noticed any leaking (condensation or into the cab). I will follow up if this changes.
Here's some photos post install with the lights on. I really want to like this product considering how it looks at the moment. Time will tell.