Is flipping the switch on an old light bulb more expensive than letting in run for a short time?

ebeowulf17

Joined Aug 12, 2014
3,282
I did a little testing after building an Arduino-based current transformer data logger. This was a 40W incandescent bulb. Only one half cycle at really high current, and less than three full 60Hz cycles to settle in completely, so about 50ms for this particular bulb to fully settle, but less than 10ms at dramatically higher current.
 

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