Is there a good way to emulate a LED?
Was thinking Self illumination of custom material but seems not bright enough.
Working on a small IoT kinda device, and would like to see if putting LEDs to
sort of simulate hot spots a bit.
No, self-illumination has no proper strength. What you would have to use is the secret Cycles Emissive material, which you already know about ^.^
Right!
[adding note]
TestShowPrivateContent
I said secret! 
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Was it possible to do emmisive no shadows?
So the light source object would not cast shadows?
Did you try unchecking the Cast Shadows checkbox for the object with the led material?
nvm, that doesn’t work. I will have to add some mods to the material for that.
Thanks! That’ll be great.
made comment by mistake[this one]