"Dave Plowman (News)" wrote:

In article ,
Michael A. Terrell wrote:
Whatever. But the principle remains - filament lamps have a high start
up current which could be too great for a small regulated supply.

Where did he say the supply was that small?

He didn't.

If it won't handle the preamp & the lamp at the same time its too damn
small, anyway. Even small wall warts start around 200 mA.

FFS. Try measuring a small filament lamp start up current. Illuminated car
lamps switches could easily be too much for one - they might have to be
visible in the daylight.


I did. About 40 years ago. They were in the 10 to 50 mA range.

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