Ron is right! Even though MH pump out harmful UV the lights "should" have a UV glass on them.
I would not go near this!
Another reason why LED's that are UV only go down to about 380-390 much of which if not all is filtered out by the shield.
Its quite a myth that UV from aquarium lamps gets to the corals, the name UV came from T5 tubes where they adopted the term to market purple colour.
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