7.11.1 Light source(s) to approximate the spectral distribution of solar radiation for air mass m = 2 for testingTesting shall be done with a Xenon high pressure lamp with filters chosen so that the specified illuminance of (50 000 ± 5 000) lx and the irradiance values (with permitted tolerances) given in Table 3 are reached.Radiation source using one lamp Use an ozone free high pressure xenon arc lamp, a heat absorbing filter and a cut-on filter as specifiedin Figure 5.