Yes, they're pretty useful. Use mine for dog walking after dark, and for taking her out for a before-bed pee! Deffo go for one with LEDs - much better than the little bulb lamps.
PETZL are the well-known brand, as used by cavers, potholers and such, but tbh mine seems OK and batteries last for ages. It came from Millets! CPC also do lots of camping stuff, including head torches, but you need to be buying other stuff off them to avoid the P&P.