I hope it'll be enforced, not like incandescent lightbulbs, which, months after the ban, became available again in every store as a light source "for basements and garages", with a label that says "do not use at home!".
What's wrong with that? If somebody wants to pay more for electricity, why not let them? And besides, they have significantly different light spectrum.
So you will be allowed to buy it, but you cannot use it on open fields.