The festool light is good but a bit pricey if its only going to get used occasionally,
Are you wanting a torch type for just spot checking etc or something so you can see what your doing whilst polishing ie floodlight/working light?
I use a halogen flood lamp 4/500 watts, you can get them on tripods or floor stands, only downside to these is they don't like being moved about to much as it can pop the bulbs quite easily, generally though for swirl spotting and being able to see your work well I can't fault mine.