ΔE 11.1, fair: the same colour family, but not a straight swap. Bright Orange is noticeably lighter than Quinacridone Red Light.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Bright Orange is noticeably lighter than Quinacridone Red Light.
The same difference applies the other way round: Quinacridone Red Light is noticeably darker.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Quinacridone Red Light on the colour wheel See Bright Orange on the colour wheel
All matches: Quinacridone Red Light equivalents · Bright Orange equivalents