The LED technology in the SINUS-220 enables near-perfect solar cell efficiency measurement. Xenon lamps used to be the standard light source for measuring solar cell performance. But they suffer from spectral shifts and spikes, deviating from standards by as much as 25%. The SINUS-220/270/300, however, exhibit a maximum spectral variance of only 5%.
The tuned 21-color, LED-based light source makes this exceptional accuracy possible.