[ARC5] Halogen Light Power Supplies

[Roy Morgan]

On May 4, 2015, at 4:13 AM, Dennis Monticelli <dennis.monticelli at gmail.com> wrote:

> Bill,
> 
> I have one of those ancient lamps too.  Just put a resistor in series to
> limit the current.  I run mine well below line voltage to insure its
> survival.  When under-driven the light is orange and rather dim but I still
> get a kick out of it.

Same here.  Running such  light bulb at say 100 volts or a bit less will let it last nearly forever.  There is technical information about the effect of lamp voltage on expected life - it’s a ten to the 6th power curve or some such.  The bottom line is that running a 120 volt lamp on 105 volts will let it run for a VERY long time.

The longest burning light bulb is at a fire house in Livermore, CA, and is much celebrated:

http://www.centennialbulb.org/

Happy glowing!

Roy

Roy Morgan
k1lky68 at gmail.com
K1LKY Since 1958