This is the Edison bulb that Ott-Lite makes.
http://www.amazon.com/OttLite-25ED12.../dp/B002X7XEYM
I've had 5 Ott-Lites. One buzzed, so I took it back. The LED one was too bright (my eyes are over sensitive to bright light) and the other three I've kept. All of mine are small to smallish table top models.