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Light, spectrum and help


New Member
Hi, i write here becouse probably on this forum i was saw something about spectrum (i forget where i saw it). First i want to apalogize becouse my english its not so good. I hope i explain good what i want to say. Then now:
I was saw here something like a "calculator". Its calculator with "spectrum of light" or something like that. Topic its about a LED. In this calculator i was can take a light color and later i seen what spectrum its can do (like a take meybe a 1 warm white, 1 royal blue, 2 deep red). I saw ratio this color, spectrum etc.

Someone can help me? If this post are write not good, i can write it meybe some better.
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