On 01/27/2015 03:27 PM, philo wrote:

I don't know where your post came from but
with incandescents, I find it best to drain the vacuum out of them once
a year and fill them up with new.

And don't forget to check that the vacuum cylinder from which you refill
the bulbs has the EPA mark showing that the contents are compliant with
the latest regulations. I've read that some unscrupulous vendors are
selling expired vacuum as still usable.

Perce