Laptop use and LED light use (and most other uses of electricity) are not increasing so rapidly that they can not be accommodated by the normal expansion in electric system capacity that has been part of long term planning for quite a while.

Instead much of it is being handled by bringing new fossil power plants on line that would not have been built if not for all the new data centers.

The other things that are causing significant increases in electricity use, like more people getting heat pumps and EVs, are all very spread out and so are much less likely to force new fossil fuel power plants.