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Posted By: C.B.S New & Improved "BPF" LED Headlight Bulbs - 01/04/19 5:19 pm
British Pre-Focus LED Headlight Bulbs


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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
Looks very interesting..
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!
Posted By: C.B.S Re: New & Improved "BPF" LED Headlight Bulbs - 01/05/19 4:22 pm
KC, I liked the 1st bulbs too but these are much better. The beam is more focused on the road where it should be.
Sounds good. At least now you won't need to worry about a negative ground bulb getting into a positive ground box.
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.
Posted By: MikeG Re: New & Improved "BPF" LED Headlight Bulbs - 01/09/19 10:14 pm
Just ordered one myself for the BSA A10. It has to be better than the candle on it now. Report to follow!
Same here, ordered one the other day.
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.
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.
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 ?
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.
Posted By: MikeG Re: New & Improved "BPF" LED Headlight Bulbs - 01/13/19 2:06 pm
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.
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.
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
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
Got 2 myself......plus 2 x new 'Lucas' 7" reflectors. Thought I only ordered one lens but 2 turned up so I guess I have a spare smile

Needed the lens for the Trident, it presently has a Lucas sealed beam in it, which is a good light, but I always worry about 'what if it blows and I'm miles from home'...I can't replace the bulb. So the new reflector with the LED globe fixes that, cos if the LED burns out I can just buy a H4 or std type globe and go again.

Can't comment on how good they are just yet, Trident is getting a make over in the top end....new Beadling barrels.

Write some report about them after covering some miles.
Posted By: Allan G Re: New & Improved "BPF" LED Headlight Bulbs - 06/05/19 10:35 am
Originally Posted by HawaiianTiger
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


I’d have to read up on the MOT manual as it’s been 3 years since I last did any testing, but from memory (in the UK at least) the bulbs should not be flickering for MOT regulation.

The other concern with a flickering light is those darn cage drivers may think that your flashing them and turn in front of you... it’s because of this that I stopped riding with lights on during day light hours. (Unless cutting through dense traffic then I put main beam on, not bright enough to dazzle anyone but it does get you noticed and fewer people change lanes in front of you)
I think there is at least one state here that is encouraging motorcyclists not only to ride with lights on (mandatory) but hat you leave the high beams on. During the day there doesn't seem to be a problem with blinding someone this way and may well allow the motorcyclist to be seen better than with just the low beam on.
I guess it really depends on where you ride. Where I ride, motorcycle accidents are kind of rare and fatalities down to one or two a year if that. I ride my British bikes with headlight on during daylight hours only when my charging system allows it, or on the highway. Around town, there is a constant discharge of the battery that will eventually get you stranded.
They both have switchable headlights whereas the Honda does not and also the law exempts old bikes in the daylight lights-on law.

My mantra, which has worked so far, is to ride like you are invisible anyway, which is at least sometimes true even with flashing high beams, orange vests, open pipes, you name it.

Cheers,
Bill
love reading you stuff. here in Southern California freeway riding is not too popular mainly because of driver distraction and cars are so quite and fast now too many drivers are on auto pilot. Asleep at the wheel 75-80 in slow lane is dangerous. They tailgate and make me uncomfortable. L. A. is flat out nuts two or three accidents per day on average. I white line as a means of defense. I prefer two lanes off the beaten path for my riding.
Thanks for all your good advice in the past.
Scott Garland
How did these bulbs work out? Any long-time reviews? Did they hold up in a rolling vibrator? Will they be a good choice for a stock 1972 Tiger? Thanks, BA
Posted By: C.B.S Re: New & Improved "BPF" LED Headlight Bulbs - 01/26/21 5:35 pm
We have many reviews on the website, very bottom

https://www.classicbritishspares.co...ts/british-pre-focus-led-headlight-bulbs
Posted By: DJinCA Re: New & Improved "BPF" LED Headlight Bulbs - 01/26/21 11:38 pm
I have not ridden much in the last year, but I bought one sometime in 2019 and liked it. I was tired of the incandescent bulb dying. I was a little disappointed when it wasn't working in Feb. 2020. I finally got around to pulling it out and checking it. The LED light is FINE! it is a problem with my switch. I don't ride much at night, so mostly care about visibility. The LED is great, brighter than the incandescent, and apparently much more durable. I can't really comment on the of light on a dark night, because I haven't given it much of a test, but makes me more visible riding those twisty forest roads.

DJinCA
By C.B.S;
"We have many reviews on the website, very bottom"

I read two reviews on that site from late last year and one guy had to install a diode to make it work with both high and low beam. The second guy had to disable his indicator lamp on his Norton to get it to work. I will probably get it anyway since just like DJinCA above, I don't drive at night very often but I would definitely like that option. Has this issue been addressed?
Posted By: C.B.S Re: New & Improved "BPF" LED Headlight Bulbs - 01/28/21 5:24 pm
Appears to be on some applications that you may have to run a diode
Come on guys, let's hear some long-term reviews ! Diode or no diode I need to know if the pattern through a stock lens is adequate or better. Is the brightness blinding oncoming traffic on a dark night? Do they flicker? Do they last? Are they worth the price? -BA PS- What is an "ET machine"? ty
Originally Posted by BAinLA
PS- What is an "ET machine"?
ET means Energy Transfer. It was used on competition machines and provided 6V alternating current to power the lights. The original lighting was weak so ET guys would appreciate an easy upgrade to bright LED lights if possible.

A non polarity conscious LED bulb sounds like it would fit the bill because it implies that it will work with + or - ground systems. Since AC power continually changes from + to -, it's possible a LED bulb would work but I don't think anyone has reported on this yet. Magnetoman may at some point report his findings because he is curious about the possibility himself.
Posted By: BAinLA Re: New & Improved "BPF" LED Headlight Bulbs - 01/29/21 10:43 pm
Originally Posted by Stuart Kirk
Originally Posted by BAinLA
PS- What is an "ET machine"?
ET means Energy Transfer. It was used on competition machines and provided 6V alternating current to power the lights. The original lighting was weak so ET guys would appreciate an easy upgrade to bright LED lights if possible.

A non polarity conscious LED bulb sounds like it would fit the bill because it implies that it will work with + or - ground systems. Since AC power continually changes from + to -, it's possible a LED bulb would work but I don't think anyone has reported on this yet. Magnetoman may at some point report his findings because he is curious about the possibility himself.

Thanks for explaining that to me Stuart.

I'm not very interested in theory at this point since I have a bike sitting here that I can't (won't actually) ride until I replace the burnt out BPF Lucas 370 45/35 bulb. The guys that purchased LED for a stock config. classic need to report back, please! -BA
I spent some time deciphering the 446 LED issue and found the answer which I tell our customers about. If your bike has a high beam warning light you must fit a diode to it to let the low/high beam switch work. The warning light path let's the LED decide the power is coming from the warning light instead of the switch (remember it's logic chip is looking for positive or negative ground). Install a diode between the warning light and its ground so current cannot come from the ground to the LED. I recommend the small spade fuse type used for Ford air conditioning compressors as using an in-line fuse holder keeps the assembly small enough to hide in the headlight shell.
Originally Posted by The Bonneville Shop
I spent some time deciphering the 446 LED issue and found the answer which I tell our customers about. If your bike has a high beam warning light you must fit a diode to it to let the low/high beam switch work. The warning light path let's the LED decide the power is coming from the warning light instead of the switch (remember it's logic chip is looking for positive or negative ground). Install a diode between the warning light and its ground so current cannot come from the ground to the LED. I recommend the small spade fuse type used for Ford air conditioning compressors as using an in-line fuse holder keeps the assembly small enough to hide in the headlight shell.

Great, thank you sir. When I do the upgrade I will do just as you describe. Still not sure what to use for a lens/reflector but I'll worry about that when the time comes.-Brian
Posted By: Woodsie Re: New & Improved "BPF" LED Headlight Bulbs - 03/30/21 12:19 am
Can someone explain what wire in the headlight shell should I be looking for to install the diode?
Woodsie, I believe it should be the Blue/white tracer wire branching from the BPF bulbholder up to the warning lite bulbholder, depending on the model year of your bike.
-Dave
BA, I just recently bought the following bulb to update my 1965 TR6SR with 12v system, still positive ground:

https://www.lowbrowcustoms.com/coll...-unit-replaces-lucas-oem-446-414-370-312

It works, but I am not impressed. Just as happy with the old filament bulbs. The low beam is weak- it's dispersion in an original Lucas reflector is not a good pattern. The high beam is great, that was an improvement on the filament type. The colour of the beam thrown out also takes a little getting used to- it is more of a blue/white versus a yellowish from a filament type. I am undecided on how the beam works in rainy weather, I have not noted any improvement over filament. Cannot comment on whether I am blinding oncoming traffic, but anyone with these Damn leds are constantly blinding me. My ammeter tells me the current draw is nice and low, roughly 1 amp movement versus 4 amp movement for a filament. Just a couple days after installing the bulb, my battery was completely flat (NOT DUE TO BULB), and I had a nightime run home of 17 miles. I am running a stock charging and points ignition systems, the bike started roughly and the bulb did flicker using only alternator output. With battery recharged from riding, no flicker evident.
Above usage was 17 miles per night, four to five nights a week, for maybe a month and a half as of this writing.

Notes on bulb construction- this particular bulb has leds on top and bottom. Low beam uses roughly 50% of leds, high beam uses 100% A poor design feature is that the sides of bulb do not have leds, this seems to make the low beam relatively ineffective.

Personal note on Led headlights- they should be illegal. Too much light for oncoming traffic in unlit rural areas, I have to pull over and come to a near stop every night because they are too dazzling, whereas I don't have to with older filament beam equipped vehicles using proper low beam for oncoming traffic.


So in a quick summary, the bulb sold by lowbrow is what I have based my writing on. I'll keep running it, but not impressed by any means.
[i][/i] Thanks Deadstiffcatt, That's the info I was looking for. I'll keep this filament bulb until it burns out I guess and I don't need to ride at night or in the rain so it's not a critical issue. If I was in your position, I might talk to someone at LowBrow and get their suggestions as I'm sure they have heard it all by now.
A new reflector and lens has been discussed here but with my flat headlight bucket there isn't much room. You, on the other hand, should be able to upgrade with minimal trouble I would imagine. -BA
Originally Posted by Deadstiffcatt
Personal note on Led headlights- they should be illegal. Too much light for oncoming traffic in unlit rural areas, I have to pull over and come to a near stop every night because they are too dazzling, whereas I don't have to with older filament beam equipped vehicles using proper low beam for oncoming traffic.
.
Know what you mean. Here in Australia there are regulations for headlight adjustment (i.e. top of low beam not to be higher than 750mm at a distance of 30 metres), but the Authorities (you know, the ones that get excited when you exceed the speed limit) either don't know or don't care that maybe 10% of the vehicles on the road have headlights that create a dangerous situation for other road users.

Unfortunately, the manifestation of people not caring for the well-being of others can also be seen in other areas as a result of the current difficult times that the world is facing due to the Pestilence.
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