Center bulb low beam high beam brightness

General discussion of the BMW R1200RT/R1250RT
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AlreadyReadyAlready
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Center bulb low beam high beam brightness

Post by AlreadyReadyAlready »

Hello,
I recently noticed that when my 2018 R1200RT engine is running and I have the headlight in low beam mode and only the center light is on, the center bulb seems to be very bright. When I switch to high beam mode and the left and right lights come on, the center bulb seems to dim to about 50%. The H7 bulb is single-filament. I suppose the bike electronics reduce the voltage of that bulb when activating high beam mode but that's just a guess. Anyone know?
lowbeammode.jpg
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highbeammode.jpg
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Doctor T
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Re: Center bulb low beam high beam brightness

Post by Doctor T »

Both our cars do the same.
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David.
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Re: Center bulb low beam high beam brightness

Post by David. »

IMO, this lighting arrangement is a backward step. On a Camhead, there are two (L & R) low beam and one centre high beam H7 55W bulbs. When high beam is selected, all three bulbs remain the same (100%) brightness.
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