The DyLight Fluor family of fluorescent dyes are produced by Dyomics in collaboration with Thermo Fisher Scientific.
These dyes have limitations for use in microscopy and other applications that require exposure to an intense light source such as a laser, because they photobleach quickly (however, bleaching can be reduced at least 10 fold using oxygen scavenging).
DyLight Fluors have comparable excitation and emission spectra and are claimed to be more photostable, brighter, and less pH-sensitive.
The excitation and emission spectra of the DyLight Fluor series cover much of the visible spectrum and extend into the infrared region, allowing detection using most fluorescence microscopes, as well as infrared imaging systems.
[1][2] DyLight Fluors are synthesized through sulfonate addition to coumarin, xanthene (such as fluorescein and rhodamine), and cyanine dyes.