We sure are terriers in search of a resolution aren't we? Have to laugh at us!Incandescent bulbs take far less than 150 milleseconds to achieve maximum resistance. In 5 milliseconds
they are at 1/2 maximum resistance and at 10 milliseconds have reached about 80% of maximum resistance
It looks like a case of duelling citations then, the first one I quoted from https://www.picotech.com/library/results/lamp was of a 6 volt globe, showing the experimental setup and a graph of the response time along with the statement (on the second page teacher's notes)
Obviously I'm unashamedly trying to bolster my case by finding slow globes, though to be fair I did try hard to find a definitive as possible reference but couldn't [PDF warning]: http://www.wwnorton.com/college/chemist ... 1155-3.pdfThe instant that the p.d. was applied can be clearly seen. What is also very clear is that the lamp takes some 150 ms to reach maximum brightness.
The 12 volt brake lights tested show graph and table listing 0-90% to-turn-on times ranging from 118 to 256ms. No doubt the smaller 200mA filaments we are actually discussing would likely be a faster but unlikely to be orders of magnitude faster.
Rather fun to think that the slow turn on time of filament brake lights is considered to be a significant factor in driver reaction time and that LEDs have turned that around.
Anyway, since I'm still fretting, as I mentioned, about whether a resistance in the order of 40 ohms would make any difference to voltages of unknown but potentially pretty high values, I'm running away to spend more time at play
Please be congratulated on putting up with me, thank you for a civilised and amiable discussion and may all your front-ends continue to live happily ever after!
Regards, Phil VK7JJ