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New & Improved "BPF" LED Headlight Bulbs #761491
01/04/19 5:19 pm
01/04/19 5:19 pm
Joined: Feb 2014
Posts: 1,235
Lancaster, California
C.B.S Offline OP

Parts Dealer
C.B.S  Offline OP

Parts Dealer

Joined: Feb 2014
Posts: 1,235
Lancaster, California
British Pre-Focus LED Headlight Bulbs


[Linked Image]

[Linked Image]


British pre-focus LED bulbs are now better than ever..

Here's why:

-New "beam" design
-Brighter
-Dual Filament
-Non-polarity sensitive

For only $34.95 & free USA shipping you can have a bulb that actually lights up the road without any fear of not seeing or not being seen.

Our new BPF LED bulbs will do just the trick for all your night time riding come this spring.

Purchase your led bulbs today by clicking on the link below or clicking the banner above.


Link: https://www.classicbritishspares.co...ts/british-pre-focus-led-headlight-bulbs

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Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #761521
01/04/19 9:23 pm
01/04/19 9:23 pm
Joined: Jul 2001
Posts: 2,369
Gothenburg, Sweden
Morgan aka Admin Offline
Ride safe today!
Morgan aka Admin  Offline
Ride safe today!

Joined: Jul 2001
Posts: 2,369
Gothenburg, Sweden
Looks very interesting..


BSAing you
Morgan Johansson
BritBike.com.
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Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #761564
01/05/19 2:03 am
01/05/19 2:03 am
Joined: Aug 2001
Posts: 4,454
Santa Barbara, California
KC in S.B. Offline

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KC in S.B.  Offline

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Joined: Aug 2001
Posts: 4,454
Santa Barbara, California
I'm happy with the 1st edition item I tried!! Planned to put them in the other bikes, great to "conserve" the battery charging on daylight running. Fit like it was made by OEM! So now it is even better!

Last edited by KC in S.B.; 01/05/19 2:06 am.

Down to 1 BSA, 2 Triumphs, 1 '56 Chevy
Oops,.. add 1 '65 XLCH
Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #761634
01/05/19 4:22 pm
01/05/19 4:22 pm
Joined: Feb 2014
Posts: 1,235
Lancaster, California
C.B.S Offline OP

Parts Dealer
C.B.S  Offline OP

Parts Dealer

Joined: Feb 2014
Posts: 1,235
Lancaster, California
KC, I liked the 1st bulbs too but these are much better. The beam is more focused on the road where it should be.

Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #761790
01/07/19 1:14 am
01/07/19 1:14 am
Joined: Jan 2006
Posts: 2,034
Asheville, NC
Mike Baker Offline
BritBike Forum member
Mike Baker  Offline
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Joined: Jan 2006
Posts: 2,034
Asheville, NC
Sounds good. At least now you won't need to worry about a negative ground bulb getting into a positive ground box.

Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #761936
01/08/19 5:12 pm
01/08/19 5:12 pm
Joined: Nov 2011
Posts: 4,944
U.S.
Magnetoman Online content

BritBike Forum member
Magnetoman  Online Content

BritBike Forum member

Joined: Nov 2011
Posts: 4,944
U.S.
The specs say this bulb works for any + or - voltage from 6V on up so I just paid $35 to be the guinea pig to see if it actually does brighten the night on my ET-equipped Triumph. The AC output of the lighting coil means a "normal" single-polarity LED bulb only would be on half the time. While the flickering of a "normal" LED would become unnoticeable above a few thousand rpm, having only half the light output would be noticeable. This new bulb should stay on through the full oscillating cycle as well as be much brighter than a stator-limited incandescent bulb, but I'll have to see it it works out that way in practice, as well as if it has an acceptable beam profile.

Just this weekend I moved the Triumph to the back of the garage so it will be a while before I test the bulb. I hope by then I don't forget I have a different headlight bulb, and I hope the bulb actually works, because getting caught out at night with no output from a bulb would be way worse than its present feeble ET headlamp.

Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #762105
01/09/19 10:14 pm
01/09/19 10:14 pm
Joined: Aug 2001
Posts: 2,833
New Hampshier USA
MikeG Offline

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MikeG  Offline

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Joined: Aug 2001
Posts: 2,833
New Hampshier USA
Just ordered one myself for the BSA A10. It has to be better than the candle on it now. Report to follow!


1960 BSA A10
2007 Suzuki Bandit
1957 A10
(Used to be a Triumph here)
71 Norton Commando
17 Triumph Bonneville

Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #762106
01/09/19 10:19 pm
01/09/19 10:19 pm
Joined: Nov 2010
Posts: 3,219
Arlington, Massachusetts 02474
kurt fischer Online content

#irideslow
kurt fischer  Online Content

#irideslow

Joined: Nov 2010
Posts: 3,219
Arlington, Massachusetts 02474
Same here, ordered one the other day.


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: New & Improved "BPF" LED Headlight Bulbs [Re: Magnetoman] #762138
01/10/19 7:14 am
01/10/19 7:14 am
Joined: Aug 2001
Posts: 1,975
The Northwoods... Michigan
Steve Erickson Offline
BritBike Forum member
Steve Erickson  Offline
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Joined: Aug 2001
Posts: 1,975
The Northwoods... Michigan
MM, PLEASE don't forget to post your results. The ET stands to benefit the most from these bulbs if they work... as you know. I might actually be able to see the next deer I bounce off of.

Re: New & Improved "BPF" LED Headlight Bulbs [Re: Steve Erickson] #762325
01/12/19 12:33 am
01/12/19 12:33 am
Joined: Nov 2011
Posts: 4,944
U.S.
Magnetoman Online content

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Magnetoman  Online Content

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Joined: Nov 2011
Posts: 4,944
U.S.
Originally Posted by Steve Erickson
The ET stands to benefit the most from these bulbs if they work...
Hold off until I have time to test them. Mine arrived today and even though I don't have time to do anything I took a little time anyway. I hooked one of its "filaments" to a power supply and the bulb begins to light up at 4V and seems to achieve full brightness at 5.8 V, at which point according to the power supply's ammeter it was drawing only ~1.5 A. The other filament behaved the same, although it drew ~1.8 A Although I'll instrument it properly for illumination, voltage, current and frequency response(*) when I get a chance, taking these at face value it only needs ~20 W to give full brightness from both filaments (and it certainly looks bright). That's less than 2/3 the power the E.T.'s lighting coils supply. That's the promising news.

Something to worry about is how irritating the flicker will be. If the filaments are "instant" on and off at the threshhold voltage, rather than taking at least ~5 msec.(*) to fade once they're on, there's a considerable part of the duty cycle when they will be off. On the other hand, an appropriate capacitor may easily take care of that. However, it also remains to be seen if the beam pattern is acceptable.

Anyway, having done only the most superficial of tests, at this point I'm cautiously optimistic this bulb could make our E.T. bikes forces to be reckoned with after the sun goes down. If so, it will remove the only factor where our E.T. systems aren't vastly superior to bikes having those wretched batteries that I hate so much.

(*) the voltage from the stator goes through 6 "zeros" per revolution so at 1800 rpm that happens 1800 revs/min x 1 min/60sec. x 6 zeros/rev = 180 zeros/sec or 1 zero every ~6 msec.

Re: New & Improved "BPF" LED Headlight Bulbs [Re: Magnetoman] #762348
01/12/19 7:29 am
01/12/19 7:29 am
Joined: Sep 2013
Posts: 1,839
Pacific northwest
Q
quinten Online confused
BritBike Forum member
quinten  Online Confused
BritBike Forum member
Q

Joined: Sep 2013
Posts: 1,839
Pacific northwest
Originally Posted by Magnetoman
Originally Posted by Steve Erickson
The ET stands to benefit the most from these bulbs if they work...
Hold off until I have time to test them. Mine arrived today and even though I don't have time to do anything I took a little time anyway. I hooked one of its "filaments" to a power supply and the bulb begins to light up at 4V and seems to achieve full brightness at 5.8 V, at which point according to the power supply's ammeter it was drawing only ~1.5 A. The other filament behaved the same, although it drew ~1.8 A Although I'll instrument it properly for illumination, voltage, current and frequency response(*) when I get a chance, taking these at face value it only needs ~20 W to give full brightness from both filaments (and it certainly looks bright). That's less than 2/3 the power the E.T.'s lighting coils supply. That's the promising news.

Something to worry about is how irritating the flicker will be. If the filaments are "instant" on and off at the threshhold voltage, rather than taking at least ~5 msec.(*) to fade once they're on, there's a considerable part of the duty cycle when they will be off. On the other hand, an appropriate capacitor may easily take care of that. However, it also remains to be seen if the beam pattern is acceptable.

Anyway, having done only the most superficial of tests, at this point I'm cautiously optimistic this bulb could make our E.T. bikes forces to be reckoned with after the sun goes down. If so, it will remove the only factor where our E.T. systems aren't vastly superior to bikes having those wretched batteries that I hate so much.

(*) the voltage from the stator goes through 6 "zeros" per revolution so at 1800 rpm that happens 1800 revs/min x 1 min/60sec. x 6 zeros/rev = 180 zeros/sec or 1 zero every ~6 msec.


Your worried about 50hz flicker at idle ?

Last edited by quinten; 01/12/19 8:40 am.
Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #762384
01/12/19 5:58 pm
01/12/19 5:58 pm
Joined: Nov 2011
Posts: 4,944
U.S.
Magnetoman Online content

BritBike Forum member
Magnetoman  Online Content

BritBike Forum member

Joined: Nov 2011
Posts: 4,944
U.S.
Originally Posted by quinten
Your worried about 50hz flicker at idle ?
I wouldn't have written what I did if I didn't have valid reasons to be concerned that it might be an issue with these bulbs on the road when operated on the AC from an E.T.'s lighting coils. However, rather than a pointless data-free argument now, wait until measurements provide the answer. Whether or not there are issues depends on if the phosphors used to make the light from these bulbs white(ish) have decay times >5 ms and/or the characteristics of the electrical circuitry the drives the bulb. It requires measurements to know.

Meanwhile, if someone wants to try one of these bulbs in their E.T. bike before I find the time to make the measurements, it's important is to test it on a dark, moonless night. It's under those conditions where stroboscopic effects, if any, will be most noticeable and most objectionable.

Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #762450
01/13/19 2:06 pm
01/13/19 2:06 pm
Joined: Aug 2001
Posts: 2,833
New Hampshier USA
MikeG Offline

BritBike Forum member
MikeG  Offline

BritBike Forum member

Joined: Aug 2001
Posts: 2,833
New Hampshier USA
Received mine yesterday. While I can't give the kind of test results MM did, all I can say is it's BRIGHT and it barely made the amp meter flicker when turned on. It will be a few months before any road testing can happen but if the pattern it throws on the wall is any indication, it should be a big improvement.


1960 BSA A10
2007 Suzuki Bandit
1957 A10
(Used to be a Triumph here)
71 Norton Commando
17 Triumph Bonneville

Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #762506
01/14/19 1:21 am
01/14/19 1:21 am
Joined: Nov 2011
Posts: 4,944
U.S.
Magnetoman Online content

BritBike Forum member
Magnetoman  Online Content

BritBike Forum member

Joined: Nov 2011
Posts: 4,944
U.S.
As a quick test, today I hooked the bulb to a Variac and cranked the dial to 6 V. Unfortunately, one of the beams flickered noticeably at the 120 Hz (equivalent to the stator's output at 2400 rpm). Interestingly, though, the other beam did not flicker.

Experiments to find a capacitor to eliminate the flickering are next, when time permits. I don't have any immediate need for a better light on my Triumph so this isn't at the top of my to-do list.

Re: New & Improved "BPF" LED Headlight Bulbs [Re: C.B.S] #762570
01/14/19 6:51 pm
01/14/19 6:51 pm
Joined: Jun 2007
Posts: 6,234
Maui Hawaii
HawaiianTiger Offline
BritBike Forum member
HawaiianTiger  Offline
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Joined: Jun 2007
Posts: 6,234
Maui Hawaii
Who cares about flickering? There are gadgets sold designed to make your old incandescent blub "flicker" intentionally. It makes you much more visible to the cage drivers.

Cheers,
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: New & Improved "BPF" LED Headlight Bulbs [Re: HawaiianTiger] #762575
01/14/19 7:38 pm
01/14/19 7:38 pm
Joined: Nov 2011
Posts: 4,944
U.S.
Magnetoman Online content

BritBike Forum member
Magnetoman  Online Content

BritBike Forum member

Joined: Nov 2011
Posts: 4,944
U.S.
Originally Posted by HawaiianTiger
There are gadgets sold designed to make your old incandescent blub "flicker" intentionally.
Those pulsate the bulb at low frequency* during the day and are disabled at night. You wouldn’t want to ride at night with a strobe for a headlight.

* 4 Hz

Last edited by Magnetoman; 01/14/19 10:11 pm. Reason: 4 Hz

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