"JG2U" wrote in message
...
On Sun, 30 Dec 2007 11:15:38 -0800 (PST), wrote:

On Dec 30, 2:11 pm, "Calif Bill" wrote:

The cheap helmets take a long time to darken. Up to a 1/4 second on
some.
My Tilman does in in about 1/25,000 of a second.- Hide quoted text -

- Show quoted text -

Bull.

Even my cheap helmet says it changes in 1/25,000 of a second. Check
it out at:
http://www.northerntool.com/webapp/w...1850_200311850


They used to be a lot slower.