The spectral power distributions provided by many manufacturers may have been produced using 10 nanometre increments or more on their spectroradiometer. The result is what would seem to be a smoother (fuller spectrum) power distribution than the lamp actually has. This is because the gases or phosphurs used to actually give off the light have very narrow spikes at specific wavelengths. So we should be wary of this, and not be fooled by the smooth SPD curves supplied by many manufacturers. Basically anything with a gentle curve is misleading.
