+1 for the previous post. My own is the same principle but different in detail (e.g. black, not white, and the lens is round, not square) but as said, same basic idea. I've fitted mine with a daylight long life bulb and it works fine - sorry, I can't remember the make or the cost, I bought it years ago.
About the only "anti" on mine (I guess it applies to all magnifiers) is the fact that you need to carefully adjust the position to get the angle right. Otherwise you can get a slightly distorted view. It depends on your own position in relation to the lamp, your eyes in relation to the lens, and of course, your view/focus in relation to the actual cut line.
That all could be due to the fact that I wear vari-focal specs, I'm not sure, but just to say that when first trying out, the view of the cut line can seem a little weird, but don't give up, try adjusting your sitting position (or standing) and the position of your eyes in relation to the lens. Once used to the "weird view" and used to adjusting your position I find it a great help - took about 10 mins before I was really comfortable with it but wouldn't cut without it now.
HTH
Edit for PS: Don't give up and sell the saw mock. If nothing else I find the scroll saw incredibly useful for all sorts of general cutting jobs in the shop, even if not doing "proper" scroll work.