odd... a quick search shows an LED bulb (60 watt replacement) for $26
http://www.theledunlimited.com/product/FB-A6006W
looks like someone is trying to cover for their twisty, chinese made, bulbs
my point being 60 watt bulbs would be more normal home usage then 100 watt bulbs... and 60 watt bulbs have been available and don’t cost $50