Was thinking about this the other night - there are various types of anodizing out there and it seems like the further back you go (like the 70s), the lights then used HA II anodizing while it seems like HA III is now the standard. When did this happen and are has there been much innovation in moving towards even better types of anodizing and coatings?
When was HAIII anodizing invented?
- Thread starter leonardc9
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