Nova 3 front panel

Brent Hilpert hilpert at
Fri Jul 22 13:18:14 CDT 2016

On 2016-Jul-22, at 11:00 AM, Vincent Slyngstad wrote:
> From: Vincent Slyngstad: Friday, July 22, 2016 10:39 AM
>> Somewhere, I have Oshino's write-up about bulb rated voltage and bulb operating voltage, but I do remember the lifespan varies as some power of the ratio, and it makes a huge difference.  (There are also formulae for derating brightness, etc.)
> I found it -- the lifespan varies as the 12th power of the ratio.
> The current varies as the 0.55 power, and the brightness as the 3.5th power (of the reciprocal).
> So, a 12V bulb in a 28V circuit can expect 1/26000 the lifetime, and will take about 1.6X the current to burn about 20X brighter than normal.
> A 28V bulb in a 24V circuit would last about 6.3X it's rated lifetime, take 92% of the rated current, and about 58% as bright.

Nice to see the data & math on that.

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