Are cheap Amazon blue light glasses as effective as premium ones?

For clear daytime lenses, reviewers we read found the gap is smaller than the price difference suggests — Livho at around $14 tests similarly to picks two or three times the price in basic blue-light demos. For sleep-specific amber and red lenses where the blocking percentage in the 450–510nm range is the load-bearing spec, the premium options (Spectra479, Horus X) tend to test more consistently.