which way does the light diffuser on drop ceiling flourescent lighting go?

on the diamond shaped plastic light diffuser, does the diamond shaped surface face down or up?

diamond shape goes down, smooth side is up toward the fixture

5 Responses to “which way does the light diffuser on drop ceiling flourescent lighting go?”

  1. i don’t frinking know ask BEEP god.
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  2. diamond shape goes down, smooth side is up toward the fixture
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  3. my diffusers are diamond or rough side in smooth side out.
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  4. rough side down. this helps prevent dust build up on the top.
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  5. Most people put rough side down.
    In a hundred years you won’t know the difference.
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