I love this statement from their document on the 8mm pixel nodes:
Totally Waterproof. IP68.
No, really... Totally waterproof?
No ingress of dust; complete protection against contact + The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. Normally, this will mean that the equipment is hermetically sealed. However, with certain types of equipment, it can mean that water can enter but only in such a manner that produces no harmful effects.