Bad brands aren't sticky in this situation, are there. (I don't know whether good brands are sticky here.) So there's no extra incentives for planned obsolescence, because the next purchase is more than likely to go to a competitor.
They’re saying all brands use planned obsolescence to force consumers to buy lightbulbs (from any brand) more often, increasing sales for the whole industry, not one specific brand.
This is how the Phoebus Cartel worked for incandescent bulbs. Every brand was in on it, it wasn’t about improving market share for specific brands.
Bad brands aren't sticky in this situation, are there. (I don't know whether good brands are sticky here.) So there's no extra incentives for planned obsolescence, because the next purchase is more than likely to go to a competitor.
Or what do you mean?