At some point you come to realize that you may have to set some parameters on which lighthouses you are going to own. This usually happens when:
a) your credit card statement is greater than one month's take home pay,
b) you buy a $3600 teak wood curio cabinet to display your growing collection (don't looked shocked, it HAS happened),
c) you've covered every available flat surface in your house with HLs
d) you start taking the impulse buys to the office to display because you have run out of display space.
One or all of these situations can put a stop to impulse buying in a hurry.