My son is in 2nd grade, one part of his homework tonight is to show in tally marks, how many lights are in the house. I wrote a little explination to the teacher and he did tally marks for 1 bathroom ( 17 ) with all the little led's on the hair driers, curling irons and shavers, how did we ever survive years ago without them. Do a tally in your own house, it starts to boggle the mind
. And as webster says, a light is something that provides illumination, 6 tons of coal and I'm not about to count individual pieces.