Diffusing LED Bulb: Coarse vs Fine Grit

[Oubadah]

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[PCC]

Whatever sandpaper you have. I've done it with 400 grit and it works just fine.

 

[NeSSuS-GTE]

For purposes of diffusing 5mm LED light for ambient aquarium lighting, I milled the face of the LED to a flat surface. This essentially diffuses the light to 360deg.

Although, perhaps your intent is diffusing high power LEDs?

 

[saabluster]

What sandpaper should I use? So far I've been using 220 grit.

If your LED has a glass dome just use a liquid etching cream.

 

[UberLumens]

fine grit will give you a good "fog" to the lens

coarse scratches it pretty deep

its only a few seconds with fine no reason for coarse