Difference in Whelen 400 Series 6 over 6 heads

Yes...


The upper one has the light diffuser over the leds, where the bottom one doesn't... Other then that, ther are the same...
 
I guess what im after is how does the diffuser affect the output? is one just a better spread than the other or is one actually brighter?
 
Everything internally is the same except the diffuser. I prefer the lightheads with the diffuser. However there is not much of a difference. Both are used in the industry without issue.
 
The diffuser is supposed to spread the light better, but I haven't seen much of a difference bewteen the two...
 
With the project I'm working on right now, I've got a mixture of 6over6 400 series heads and haven't noticed anything that would concern me.
 

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