The effects of lamp age on the spectral output
of solar simulator xenon flash lamps and spectral
output measurement uncertainty on the
spectral mismatch are investigated. It is
demonstrated that the spectrum of an older
lamp set has a relatively lower blue and larger
red content compared to a new set of bulbs.
Measurements over the life-time of several sets
of bulbs showed large unexpected variations
due measurement uncertainty in spectral
measurements themselves. The main influencing
factors are investigated and a faulty temperature
control is found to be the main source
of uncertainty. It is shown that this alone can
affect the mismatch calculation to a larger degree
than the MMF would correct in itself