Regular 100w bulbs being illegal now. I'll put aside pointing out ridiculous it is making one of the most important inventions in the history of our entire existence against the law, and just concentrate the headaches caused by trying to find decent replacement bulbs.
As for as lumen replacement bulbs go, the highest watt available is 72, and accordingly, they're supposed to be equal to 100 incandescent watts, but that's not always the case... as a matter of fact, it's pretty rare to actually find 72w lumen bulbs that are just as bright, or possibly even brighter than 100w incandescent bulbs... just about the only place I can find such bulbs is Sam's Club (the southern equivilent to Costco), everywhere else you pick up 72w lumen bulbs, they're extremely dim and poor like a 60w incandescent bulb.
Now then, I know this is all part of some vast governmental socialist plan to make the world a greener and more energy efficient place to be, but come on, if incandescent bulbs are illegal now, then we might as well make records, video tapes, or even maps illegal too.