LED driver description, reliability aspects and factors. Currently, the most using two types of topologies for LED drivers are: More simplier quasi resonant Flyback topology with implicit active Power Factor correction for the input power up to about 120W. Resonant LLC topology, more complicated for 200W+ of input power. Good filtering is mandatory incumbent on developer, by the way, there is a standard.
Blue spectra are the highest frequency spectra of visible electromagnetic waving looking out by human sense. By the quantum (Photons) view, blue one is the most energetic powerful of the visible spectra (white lighting). For these reasons is technologically suited for manufacture converted type (generating photons with lower energy after impact of higher energetic photons on the Converter - Phosphorus or baryta mixtures) of White LEDs.