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luminous flux vs intensity for wall lighting? Answered

Forgive me if this is an elementary question; I have very little understanding of optical physics.  Asusming that's even what this pertains to.

Anyhow, I'm designing a music responsive LED display.  The gist of it is that the LEDs will be angled towards the wall slightly, with the intent being to use the wall as a sort of canvas for the light.

I know flux somehow pertains to the general light emitted/spread, and intensity to the intensity at the point of emission. Unfortunately, my grasp pretty well ends there.

As such, as I go to purchase LEDs, I'm unsure of which of the two is more important for my project (as it seems I can't have a maximum of both for my price range).  So my question is such:  Which factor (flux or intensity) will create a bolder impact in the context of visibly lighting the wall?  Keeping in mind that I don't intend or need to light the room itself, merely create the boldest display on the wall.

 Thanks for helping a novice!  


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Best Answer 9 years ago

Intensity is important, but the light angle in your case is also very important. Look to buy Bright and super bright LEDs with a 15º radiation pattern.
LEDs come 30º ,  45º  and 60º light diversion patterns.

You can understand if your light dispersion pattern is narrow the light will be
more striking on a wall.

Use only clear LEDs as the frosted king is undesirable for your application.



9 years ago

The super-bright LED makers, like the Cree's and Lumiled's of this world also offer optics that can be glued on to the LED to improve the emission characteristics, look for high flux, and the optics will collect it to deliver high intensity.