convolution function for more than 2 functions

How can I use convolution function to Marge more than 2 functions

 in matlab for 6 LEDs spectral power distribution

[Image Analyst]

Why would you want to do that? I see no sense or use in convolving all those curves together. You could add the unnormalized spectra to get the output spectra if that LED lamp had all of those colored LEDs in it, but convolving? I see no use in that.

[Alaa Al-Ahmad]

Thank you very much for your reply. In my project I need to synthesis a light source by using 6 different LEDs to make a spectrum similar to the sun spectrum in the range 400-1100 nm . I already have the spectrum for my reference (sun) and the spectrum of the 6 different LEDs. One important factor for this compression is to study the spectrum mismatch between the synthesis and the sun spectrum for example I would like to make a figure similar to the attached figures. please see the attached figure