My original Ottlite is over 9 yrs. old and has the same bulb.
I have found numerous Ott lamps at estate sales, yard sales and my favorite thrift stores. One floor lamp I purchased at an estate sale, $6.00 and the table size, $2.00! JoAnn's has a great compact size I can travel with, it fits in my purse and I use it on the train, guest bedrooms, classes, waiting rooms, and is battery operated, with my JoAnns coupon, $5.00! (orig. $10.)
Love the fact that working with these great lamps, there is no uncomfortable heat nor glare from the bulb, colors show true.
Guess I love my Ott's! Only once did I replace a bulb, and found it at Home Depot hardware store, paid $4.00. Enjoy.