Originally Posted by
wheezing donkey
Mark, my S.O. is nothing like as generous as your's. So I don't have first hand personal experience of the Vision 4 or the Ultra; but speaking as an electrical engineer who gets a tad geeky about head torches, I'd go for the Vision 4 every time. Pricewise they are in the same ball-park (£250-£300) but the Vision 4 puts out 960 lumens from 4 LEDs against the Ultra's 280 from 6 LEDs. This is because Petzl use a moulded plastic case ( presumably for the ease of mass production ) and cannot afford to drive the LED's at max power for fear of overheating. Hope house their LED's in a beautifully machined aluminium case that acts as a heat-sink and thus allows the LEDs to be driven at their maximum, if you choose the highest setting.