Some of the landing lights that I have had to change have been as high as 600 watts, with taxi lights to about 150 Watts. This combination on a wet ,dark night, will leave the marshaller unable to see his own wrists let alone where the aircraft is.
Just think how you feel driving down a dark wet road, and the approaching car doesnt dip his lights. Uncomfortable no??? Nwo add a couple of sets of driving lights as well (the kind that melt tar at two miles, and cook Roos at one mile). Thats what it is like on the ground, so please spare a thought for us.