I actually flight test lighting systems in Australia.
Part of the reason they are sometimes too bright is that the electricians leave the transformers at 6.6amps which was required for incandescent type globes. Having now flight tested a good number of LED lit runways we seem to have the settings about right.
What I particularly notice is the clarity of the lights when doing a circling approach at say 4nm. They are far superior to the old incandescent and halogens.