I'm not a knife maker (although I have made a few), but I do turn lots of wood on my lathes. I use a Moffat light with flex arm (similar in design to the ones you posted here) and it works great. Only one time have I had an issue with vibration (an off-balance chunk of wood spinning too fast on the mini lathe) and that caused the bulb to blow, but didn't bother the light. I bought two so I'd have a backup, but have been using the first one for about 3 years now with no issues. I have a detachable base mounted to my big lathe and a magnetic base on my mini.