If you are modelling illuminating effect, most likely you will model the system under non-sequential mode and you could look up '"]>`=R
W[X!P)=w]
Source Diode and Source Gaussian yCkW2p]s,K
@z$pPo0fW
to check if these two sources types support your source behavior. If they do then it should serve an good approximation for your light source.