I would suspect that the 129W value is the light equivelent of a standard bulb compared to the halogen. The 100W will be the heat equivelent.
However I'm steadily replacing all the conventional bulbs in our place with LEDs as they fail. If you need something that looks like a conventional bulb, especially in fitments that need that sparkley effect then consider LED filament bulbs. These are available in a number of styles including antique immitations like this:
Antique_LED_s.jpg
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History is much like an endless waltz: The three beats of war, peace and revolution continue on forever.
However history will change with my coronation - Mariemaia Khushrenada