A home-built confocal microscope setup was used for FLIM imaging. A fiber-coupled (FD7-PM, NKT Photonics) pulsed continuum white-light laser (SuperK EXTREME EXB-6, NKT Photonics) at 2.1 MHz was used as an excitation source delivering a wavelength of 520 nm by sending the continuum output through an acousto-optic tunable filter (AOTF; SuperK SELECT, NKT Photonics). The output of the fiber was expanded and collimated by a lens system and cleaned up by a 520 nm band-pass filter (FF01-520/5, Semrock) before it was reflected by a 30:70 beam splitter (XF122, Omega Optical) and sent through an air objective (CPlanFLN 10x, NA = 0.3, Olympus). The objective focused the laser onto the sample, which was positioned on a piezodriven stage (LPS300, Mad City Labs), and the emission was collected by the same objective. The