They'll burn somewhat longer, but output drops and color temp goes down.

Karl Wolz

Sent from my iPhone

On Apr 25, 2011, at 2:10 PM, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:

> At 09:28 PM 4/24/2011, Michael Rasmussen wrote:
>> On the chance it's not the bulbs, it's the _____, what should I check out?
>
> Rated life of bulbs
> Rated voltage of bulbs (bulb life goes down with the fifteenth power
> of voltage increase over rating while brightness goes up with the
> fifth power - rule of thumb)*
> *this is why if you buy the miracle last-forever light bulbs from the
> catalogs you'll find they're rated for 130 volts.
> Vibration, especially of a filament that's not adequately supported
> for that service.
> Insufficient ventilation.
>
> As a sort of silly example...rated life of a 3600K photoflood bulb is
> one hour.  Or was in '70 or so.
>
> Yrs,
> d
>