nospam wrote, on Sat, 05 Dec 2015 07:16:49 -0500:

he didn't say it was the same product. often, people compare products
that they think are similar, but it turns out to be different products
with different specs, so it's no surprise that the price is different.

All the links I provided at various wattages and prices were the same
product exactly (other than the name on the outside).

Most consumers aren't detail oriented, so, if they see only the $60
40 Watt part and the $15 35Watt part, they're likely to overspend to
get the extra Watts which don't exist.