I normally knit at night and when I do knit during daytime, by the window, I can actually see the difference between daytime and nighttime knitting.
Guess which ones are neater... lol
Natural sunlight does make a difference...
I am going to check out the lamp at JoAnn store and post a picture on my blog tonight (if I end up buying it!) so everybody can see if it's the same as the one they offer online for $129.99.