[TucsonDon]

I'm hoping now with my modulator that the light lasts me at least two years (the way I figure it, now the high beam is on only half the time so it should last twice as long.)

Interesting ... I wonder if the frequent "on/off" of the high beam filament might cause some strain on the life of it? I honestly don't know. But it's an interesting thought. My guess is there's some "cost" to that -- your high beam filament might last longer, but not twice as long.