Anyone with a Z1 noticed this? When you switch the projector on from the rear on/off switch,after 3/4 seconds bulb fires up for a split second then goes off before ready lamp comes on. Then when you press the on/off button on top of projector or the remote the lamp fires up again and then stays on.Is this normal, if so anyone know why this is.Is it some sort of pre warming for the bulb? I would have thought that this could cause the bulb to wear out quicker as I assume the stress put on the bulb at start up is the main factor in bulb wear. Any thoughts.