I bought the same thing for much less at Aldi's. You might shop around or wait for a sale if there's no Aldi near you. But, they will pay for themselves in savings. Not just power but they give off less heat.
My only complaints are you can't go by their labeling for comparative light (you've got to go a step up), and there's no 3-way bulb.
FYI, I saw one the other day at Lowes or Home Depot. Expensive though. I think it cost about $15.