All of the Petzl Tikkas and Zipkas claim to be only water resistant IPX4 (splash proof). Even the Myo RXP is only IPX4 - the cheapest Petzl to claim IPX7 ie waterproof even when immersed is the Myo Duo 14. I would like to find a head torch that is both waterproof AND regulated (ie the LEDs don't quickly lose about half their light). The Princeton Tec Quad has both qualities at £24.99 but has only 21 lumens, has anyone used it?