Timing Light Accuracy

Perhaps some quantitative information about timing lights and ignition delay would be helpful.
Xenon strobe tube flash delays are typically a few microseconds. A microsecond is a millionth of a second. That delay is fairly small, has little impact setting base timming, and only fractions of a degree even at 6000 RPM. 6000 RPM divided by 60 converts RPM to 100 Hz, then multIply by 4, is 400. The reciprocal of 400 is 0.0025 or 2.5 milliseconds.

The turn off time for an ignition transistor, modern IGBT is also a few to several microseconds. Old style bipolar or darlington transistors may be 10 times slower.

At 6000 RPM, on a V8 ignition events occur at 90 degrees intervals of crank. The time between ignition events is 2 5 milliseconds. As an example, 5 microseconds delay divided by 2.5 milliseconds, times 90, is only 0.18 degree.

Mopar variable reluctance distributors have more significant errors, a few degrees due to runout, slop, and crude powdered metal reluctor, and other mechanical parts and linkages.