On Jan 27, 9:24 am, bud-- wrote:
On 1/26/2013 5:25 PM, bud-- wrote:



The graph I have goes to 90% voltage. At that point the life is
increased 50% (and rising fast). The lumens are 70%. At half voltage the
lumens would be a rather low percentage (far lower than 60W equivalent).

I read the wrong scale. At 90% voltage the life is already 3.5 x

One more factor.... efficiency...

The lighting goes down fast,... the heat output ("light" we can't see)
goes up fast ...

Hint: Incandescents, at lower voltage are great in seasons where
we would like more heat that light..... In the summer... not so
much...