3 ms·An electronic signal and a photonic signal ("the light") both travel at the same speed.by endtime 16y agoAn electronic signal and a photonic signal ("the light") both travel at the same speed.orborde 16y agoAn incandescent light might take a nontrivial amount of time (tenth of a second?) to heat up and light after power is applied.locopati 16y agoBut a computer's detection and response to a signal is probably faster than a human's reaction time.