I'm going to sound right out of place here, but I cant fault my H4 single reflector headlights.
I certainly couldn't remotely describe them as, ' dangerous ', and, ' unfit for purpose '.
I find they give a good range of light both on dipped and full beam.
Maybe I have low light expectations but they are more than comparable to my Vivaro, my wifes Insignia and my Discovery.
I've got a mate who's T6 has LED headlights and we are going to do a side by side comparison. I'll post up the resulting pictures.