Yes, Model Series 03, 05 & 07 are treated with YPHOS patented nanofilm technology, designed and produced for advanced resistance against sea water.
What is nano-coating?
When you want advanced surface resistance properties, you must work in molecular level.
Nano-coating is a very thin film applied across the surface of the lights to create a super-hydrophobic outer layer, featuring incredible resistance in UV radiation and marine water.
This film remains non-toxic, safe for sea life and at the same time makes it almost impossible for algae to grow and calcium formations to build up.