Unfortunately my two non-ww triphosphor F40s both have a bad filament (one has trouble connecting, the other is intact but just runs cold for some reason) so they don't dim well. So I put in an F34, however the ballast says for F34W lamps. I can see how it wouldn't like it at full power, but if it is dimmed, is it okay to run? The ballast doesn't get hotter than normal or buzz or anything.

It does create an interesting start though, the F40 starts up normally and is brighter while the F34 hasn't start, the F34 on the other hand glows at the ends for a second before starting.