LED replacement for H4 main light bulb

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ts
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LED replacement for H4 main light bulb

Postby ts » Sun Jul 02, 2017 6:09 pm

I know this has been discussed several times in various sub-forums, but since other/newer bikes uses other than the 'H4' main light bulbs I'll ask again here.

I am not after more intense light, but approximately the same output in lumens as the standard 55/60 halogen bulbs. I just want less strain on the standard charging system of my airheads. And since room is limited in the airhead headlight shells, it looks like the external (rear) heat sink versions aren't optimal - ? ? ?

On an American forum I saw this recommended:

<http://stores.advmonster.com/native-h4/>

Something similar seems to be offered from a UK seller on ebay:

<http://www.ebay.co.uk/itm/192223452924>

but has anyone here actual experience with using a H4 replacement LED "bulb"?
ts
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Galactic Greyhound
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Re: LED replacement for H4 main light bulb

Postby Galactic Greyhound » Sun Jul 02, 2017 6:24 pm

Hi ts,

That is interesting!

I did a further Ebay search and came up with this:
http://www.ebay.co.uk/itm/2x-LED-Headli ... SwZ4dZEf9h

You will see from the Ebay link that there appears to be a few more components involved than just the LED bulb - looks like a fan component for heat dissipation is required as well?

Waiting to hear the comments on your thread! :smile:
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
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Re: LED replacement for H4 main light bulb

Postby barryh » Sun Jul 02, 2017 7:21 pm

It's ironic that LED lamps with much reduced wattage have a heat rejection problem. They do all need a fan or heat sink for long life which can cause installation problems.

The real issue though is how well they mimic the size and placement of the H4 filament so that the reflector produces the correct beam pattern. This is the one failing of almost all H4 led replacements and I've yet to hear of a perfect beam pattern being produced. They are getting better though so I keep an eye on new ones that come to the market. Philips were reported to be attempting to get official approval for a H4 replacement. When they do I expect the design will get copied.

ts
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Re: LED replacement for H4 main light bulb

Postby ts » Sun Jul 02, 2017 7:21 pm

Many thanks for comments & for that link, Ced! It's always a pleasure to read your posts about the "magic smoke" I've understood circulates somewhere inside my wires :-)

I've seen loads of similar offers - poor description ("no harmful and hurt for other drivers") and "total 160 W" (= output of BOTH "bulbs", together!) all points towards a reseller who probably knows nothing about what he is selling. Heat output? Even if I could fit that hardware inside my headlight I would't dare turn it on for fear of cooking my subloom. Ebay anno 2017 has loads of Chinese and Hong Kong sellers who operate out of a shipping office in the UK, or in this case, Jersey. VAT dodging?
ts
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'73 R75/5, '78 R80/7, '83 R80RT

ts
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Re: LED replacement for H4 main light bulb

Postby ts » Sun Jul 02, 2017 7:33 pm

Thanks Barry, good point with the proper beam pattern, or lack of for many (most?) of those offered.

The one described in the first link I posted has "Phillips Flip Chip LED" stated among the selling points; not sure if that's meant to refer to the technology Phillips are developing?
ts
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'73 R75/5, '78 R80/7, '83 R80RT

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Re: LED replacement for H4 main light bulb

Postby barryh » Sun Jul 02, 2017 7:53 pm


The one described in the first link I posted has "Phillips Flip Chip LED" stated among the selling points; not sure if that's meant to refer to the technology Phillips are developing?

Philips were developing the whole lamp and not just the LED component. The most comprehensive coverage of the whole issue including mention of the Philips lamp is on the ADVrider forum here:

http://advrider.com/index.php?threads/l ... s.1189737/

Read the whole thing because initial good reports of a particular lamp were tempered after a period of use.

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Re: LED replacement for H4 main light bulb

Postby SteveD » Mon Jul 03, 2017 3:07 pm

I've been watching that advrider thread for a while. The LED's aren't quite up to it just yet.I've gone down the Easternbeaver H4 loom and relay setup, using a Philips 130+ H4. So far, I'm happy with it.

I'm also looking at adding a driving light and have probably settled on a 4inch 35W HID.
Cheers, Steve.
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Re: LED replacement for H4 main light bulb

Postby DEEP DIVER » Mon Jul 03, 2017 3:21 pm

Do a search online for a "daymaker headlight" They come in 5 3/4" and 7 "
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Re: LED replacement for H4 main light bulb

Postby snowy » Wed Aug 16, 2017 11:20 am

Hi
Just to add my 2 penny worth
I have a number of H4 LED bulbs, when attempting to fit them they didn't work, knowing that they are polarity conscious I tried one on the work bench, got it to work but, there's always a but isn't there, I found that the earth wire on the headlamp connector was on the wrong side, on the bulbs that I have the earth was in the 3 o'clock position not the 9 o'clock as per the airhead wiring and with respect to the centre pin being at 12 o'clock.
snowy

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Jon S
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Re: LED replacement for H4 main light bulb

Postby Jon S » Sun Sep 17, 2017 3:26 pm

Hi ts:
Give this site a look over
http://www.norbsa02.freeuk.com
He seems to know his stuff and also does loads of other lighting stuff for bike both 6v and 12v
"When the commode is full, never push it" :grin:

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Re: LED replacement for H4 main light bulb

Postby Galactic Greyhound » Sun Sep 17, 2017 4:40 pm

Hi Jon,

Thanks for posting that link - very interesting.

Has anyone fitted one of these H4 LED 'Daylighter' bulbs to an R1100RT?

The bulb looks like it is using Surface Mount Devices (SMD) for the light source.
I have been gradually changing my household filament type bulbs to LED SMD types.
The SMD source gives a nice bright light especially if a 'warm white' colour range is chosen which is similar to a filament bulb colour for household use.
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" onclick="window.open(this.href);return false; - It works!

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Re: LED replacement for H4 main light bulb

Postby macplaxton » Thu Sep 21, 2017 10:27 am

Hi ts:
Give this site a look over
http://www.norbsa02.freeuk.com
He seems to know his stuff and also does loads of other lighting stuff for bike both 6v and 12v
He know's his stuff. I used to pour pints for him on a Tuesday night when the local MAG were meeting. :wink:
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Re: LED replacement for H4 main light bulb

Postby chasbmw » Thu Sep 21, 2017 12:17 pm

I use a 6v LED on my 1958 R50, it is a real improvement over the original glowworm and certainly helps in daylight.

It was bought from thhese guys who have a wide selection of bulbs for older vehicles. http://www.dynamoregulatorconversions.com/
Charles
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1975 R90/6
1958 R50
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Re: LED replacement for H4 main light bulb

Postby Andymarksonline » Sat Sep 23, 2017 10:19 am

Not LED I know but I use osram night breakers in my triumph, much improvement over the standard candles!

Andy.


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