long the simulation will run. The wavelength range is used to calculate the luminophore spectrum from a polynomial fit of the input absorption and emission spectra and to ensure the absorption/emission is zero beyond the bounds of the luminophore. The surface normal method of efficiency measurement is used by default, but the enclosing box method can be selected if an alternative method for ray counting is desired. Checking either the "convergence plot" or "show simulation" boxes will display either as requested.