I have a portable Ott Light that I use. It doesn't have the goose neck but works very well. I use many of my machines as I have 8 total, 7 of which are in working order. Depending on what I am working on depends on what machine I use.
My light travels from one machine to the next. It works great especially when you are trying to sew dark colors which I have a hard time seeing.
I would recommend them as they imitate natural light but would never pay full price. I bought mine with Joann's 50% off sale.