Who is this professor / where do you study? Would be interesting to know, we have pretty much of this stuff at my education and there always seems to be conflicting info regarding alternative energy specifically.The technology is moving forward quickly, according to my professour at the course in university, we already have the technology to provide the entire world by solar power ( Could be he was overly optimistic though, but he is famous in this field! ), however the costs and the thin film problem does not currently make it a viable option.
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As far as the lighting go I am curious what the impact will be of banning none environmental friendly lamps. Some people said it will not have a big effect since these lamps produce heat, but this heat is not always necesarry all year around, especially not in summer, and as we already concluded we have great ways to produce heat in a very low energy consuming way!
About lighting: It does make up a significant proportion of our electricity consumption but much of it is from fluorescent lamps in industrial buildings etc so they already don't use lightbulbs.
Also, as some of progress in the move away from fossil fuels is a move towards using electricity instead we have to produce that extra electricity somewhere.