wrote in message
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William Sommerwerck wrote:
I have no trouble seeing it. An incandescent bulb takes a fraction of a
second to reach full brightness, and this is plainly visible. 220V bubls
should be no different.

If someone doesn't see it, have them looking at a car with LED
turn-signals and compare the result to looking at a car with incandescent
turn-signals. They will see the difference.

--
Met vriendelijke groet,

Maarten Bakker.

People keep mentioning car bulbs, but we are comparing apples and oranges
here, based on the fact that they are both fruit.

One of the reasons that a car bulb is slow to reach full output, is that the
filament has to be made thick and robust for enhanced reliability and
failure proofing from vibration. That makes it have substantial thermal
inertia, so much so that you can indeed see it hot up. On the other hand,
high voltage domestic lightbulbs have no such constraints on their
filaments, as they are not going on and off all the time like a brake light
or indicator, and are not subject to vibration in normal use. This results
in the manufacturers being able to design them with a much more delicate
filament, with the result that, to all intents and purposes, the ramp up to
full output is 'instantaneous'.

Arfa