The spectral features of both CBD and THC align approximately to the spectral region captured by C310 (particularly for THC). However, irradiation of these species deposited on-filter would cause the emission band to become convolved with LED reflectance, due to the high-power of the light source and sensitivity of PDs. Moreover, distinguishing the spectral features of CBD and THC would be potentially challenging given their significant overlap. We therefore considered an alternative approach.