How does the increase in power allowance described in 9.6.2 work?
Firstly, how decorative is decorative. Do pendant fixtures hanging over a reception desk, which while intended as decoration still of course help light the desk, count? How about track lights shining on wall art in a conference room?
And what do you do; just ignore them, or add their total wattage to the allowance then add the same into the wattage installed? That latter is what the section seems to say, but I don't see much point it, as opposed to simply ignoring them on both sides of the equation.