So far I've only seen one on t4r go bad, it was a 30" and HOJeepster owned it. It began leaking and forming condensation after the glass lens cracked. He had it mounted in the lower bumper though where it's prone to having rocks thrown at it. I believe it continued to work despite the crack and condensation.
I'm sure others have gone bad elsewhere, but since everyone relabels these bars as their own brand you won't find much info using the Hanma name.
I have a B series 13.5 and two 7.5s on my Gobi rack, I get a lot of hood glare and haven't remedied it yet. I'm thinking the best option will be to create some sort of cut off that sticks out beneath the light and blocks most of the light that hits the hood. The two 7.5s are spots and there is still so much stray light that hood wash can't be prevented by aiming.
I wouldn't be too concerned in the flood vs spot issue as the optics of the B series isn't great and you probably won't see much of a difference.
