Ah, so they charge a lot more for less light. Wow, now that's
MARKETING!

How much do they cost a Wal Mart?




They're just neodymium glass bulbs, the concept has been around for over a
century. The blue glass filters out a bit of the yellow light, it does
result in a "whiter" appearance, with a penalty in lumen output. IIRC they
cost about 50% more than ordinary bulbs, which is not much to begin with.
The vast majority of the cost of an incandescent lamp is the electricity to
run it.