ΔE 4.9, very close: most people won’t see a difference side by side. Our swatches for the two are almost the same. They are different kinds of paint: Citadel Warp Lightning is a one-coat contrast-style paint and Pro Acryl Bright Yellow Green is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Yes, for most jobs. Very close match (ΔE 5). The swatches are almost the same. They are different kinds of paint.
The same difference applies the other way round.
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 Warp Lightning on the colour wheel See Bright Yellow Green on the colour wheel
All matches: Warp Lightning equivalents · Bright Yellow Green equivalents