Steve,
Neither the Vintage Engine Committee nor it's spokesman have yet determined the acceptable color for ignitions.
I suspect this will be a lengthy process involving studying reams of data, looking through countless historic photos of what was used "in the good ol' days" (which might pose a problem since they're black an white), proposing a rule change, being voted down by the board... and then doing whatever they want because only they know the secret "intent" of the original rule, regardless of how it's written.
Regardless, I will refer to the board's decision as the "official" ruling of the SCTA, and continue to use my red one.
This is way too much fun...
![cheers :cheers:](https://www.landracing.com/forum/Smileys/akyhne/cheers.gif)