On Wednesday, June 28, 2017 at 4:58:08 PM UTC-4, wrote:


Since dimming is usually done at assorted levels, the above effect has sod all effect on lamp life in the real world in most cases.

Suffice it that if a halogen lamp operates at 80% of nominal voltage, the halogen effect (tungsten vapor re-depositing on the filament) will not take place - however that reduction-in-voltage occurs.

Peter Wieck
Melrose Park, PA