fundamentally I share your pessimism tho for different reasons. Short of getting the population down to under 5 billion (and 11 billion is looking more likely), it's going to end badly. The particular cause is the only question.
But... on a day to day basis, LED bulbs are a win, win, win. High quality light, energy consumption so low they pay off in under a year under normal usage, and instant on.
I also have to say that the possibility for nuclear power is over. It's never been a significant share of world power generation and while nuclear is great- nuclear plus humans has a terrible record- essentially a major accident every 10 to 12 years with a resulting loss of use of real estate for hundreds of years.
Coal is actually worse (seam fires) and results in the loss of entire small towns and hundreds of square miles of real estate but it is well established.
Solar is projected to be down to .36 cents/watt by 2024. At those prices-- why not use it? It's like LED's. Lower than current power generation prices for several countries, it provides energy during the periods of highest power usage, has lower water usage, lower pollution profile (tho I'm wondering what is hidden from us that will become apparent in mass production). It's prices are still dropping rapidly (in part due to temporary subsidies). Installations are rising logarithmically and have passed an inflection point towards exponential growth.
The nice thing is- everyone benefits. If solar cuts oil demand by 5%-- that has a huge effect on the price of oil overall. Same for coal.
Perhaps someday, they will design an inexpensive reactor system that is reliable combined with a breeder reactor to reduce waste to 1-3% quantity. I think smaller would be better. And based on the new autoshut down modules. And with no way stupid or careless humans can fuck things up.
But really- 11 billion people is no meat for most people (which is not as good as vegans project), lower quality of life, and a fairly pointless existence with the high automation we have coming (sitting around consuming food and entertainment- no real work to do for most).