Leica WLL is the complementary system to the confocal microscope allowing fine tuning of fluorochrome excitation wavelengths resulting in the minimum cross-excitation and specimen damage. The system provides spectral specimen scanning with the excitation wavelength acquiring; phototoxicity reduce; fluorescence attenuation imaging (FLIM) with the excitation within 470–670 nm; precise spectral discrimination of fluorochromes with nearby emission spectra; etc. For more information visit www.leica-microsystems.com.