Quote Originally Posted by hifi_dave View Post
Any bulb running off the mains will provide the 50 Hz 'flicker' you need to read the strobe and yes, there are versions of the strobe for 60 Hz.
Yes, but it can't be guaranteed to be 50Hz from the mains as it alters during the day & night according to demand. Admittedly over a 24Hr period it has legally got to be 50Hz to keep syncronous motors accurate in clocks, but on a smaller timescale it can vary from lower than 49 to over 51 Hz