Different Diffusers ?

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Hi

Could anyone tell me the difference between a prismatic diffuser and an opal diffuser when it comes to flourescent strip lights ?

Cheers
 
Prismatic:
4860.jpg

Clear plastic with lots of spikey bits

Opal:
4861.jpg

'Smoked' plastic with no spikey bits
 
They are both methods of reducing the glare from bare light sources.

Opal does it by scrambling the light so the light source appears to come from a greater area.

Prismatic does the same thing by redirecting the light.
 
Depends what you mean by the difference, in end user terms opal gives a softer light.

Prismatic controllers are better for work light, but have been superceded by cat II louvres for most commercial uses.
 

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