11-08-15, 11:31 AM
Thank you. That is the first piece of evidence you have posted. A You-tube video. That it contradicts some of your points is a little embarrassing but it is great to see that you are finally using evidence.
1. measure the center point of the arc
Let me try again. You do NOT need to measure the centre point of the arc. Look again at the specifications that I posted. There is NO measurement to where the centre of the light is. There is a measurement to the position between the low beam and the high beam where the light isn't.
The position you measure is the gap between the low and the high beams.
The place where there is no light coming from between the high and the low filaments is the place you need to measure. It needs to be certain distance from the baseline.
A H4 bulb can give off light from two different positions. The high beam position and the low beam position. The position of the low beam must stop before the high beam can start so the reflector can do its job.
You claimed that all HID bulbs where made with the light source in the wrong position. The specification I posted shows how to measure a bulb. The picture I posted shows a bulb being measured. The position in the picture matches the position in the specification proving that the light source is in the correct place, proving that your claim is wrong. That is the point.
2. Try several millimetres
Try some evidence. Even the video you posted shows that the lateral movement, if it could be measured, would be less then a 10th of a milimeter. That is not enough to affect alignment.
3. Baffle hole that its too small
Too small for what exactly?
4. The reflector is not "seeing" all of the arc
Again, some evidence would help. Or, at the risk of repeating myself, so?
5. ...its pulling more on hi-beam than a Halogen bulb would be.
Now you are just making shit up. Why don't you measure the resistance of the solinoid on one of the many HID bulbs you have lying about and apply ohms law to determine its current draw. You can even impose worst case weak battery/damaged alternator scenario and calculate draw at 10 volts instead of 12.
6. ...bulb dosent stay perfectly central
Now I am repeating myself. So? Or if you prefer, I refer the honourable gentleman to the reply provided to question 2.
7. ...That's far far less than the advertised 3000hrs
True. That said, they are fitted to a motorbike and not sitting on a test bench. I never got the advertised life out of a traditional bulb either but it is not like a failure is going to leave you stranded since everything is doubled up. That said. I do carry a traditional H4 bulb under the seat when I am going on longer trips.
Now to LEDs.
CREE are a manufacturer, not a bulb type. You would get almost exactly the same results with LED replacements for H4 bulbs from any other manufacturer. The problem is not who makes them, or what type emitter is used, or the position of the LED elements, (which by the way are as 'right' as it can be given the nature of LEDs), it is much simpler than that. As I have mentioned more than once, LED emitters are not point sources. LEDs are surface mounted with the light being emitted perpendicular to the surface. Yes there is a lot of spread, but none of the light can go through the surface so full surround reflectors (the type you get with H4 bulbs etc.) are not a lot of use. The result is clear from the video. The light source emits as much or more light (in Lumens) as traditional H4 bulbs, but the direction it is shining in means the reflectors can not point much of it down the road.
And finally -
The position of the arc bulb within the main glass envelope is almost always incorrect...
No it fucking isn't as I have proven.
The light output from a HID is just to powerful,
Correct. Pity the rest of the sentence is bullshit. You used this argument the last tim eyou tried to knock HIDs and I proved, using MOT documents, that the test is for the pattern which is correct or it isn't. The intensity is neither measured not important.
there is enough freeplay to allow them to wobble and jiggle
I refer the honourable gentleman to the reply provided to question 2.
arc itself which isn't actually fixed
I refer the honourable gentleman to the reply provided to question 2.
1. measure the center point of the arc
Let me try again. You do NOT need to measure the centre point of the arc. Look again at the specifications that I posted. There is NO measurement to where the centre of the light is. There is a measurement to the position between the low beam and the high beam where the light isn't.
The position you measure is the gap between the low and the high beams.
The place where there is no light coming from between the high and the low filaments is the place you need to measure. It needs to be certain distance from the baseline.
A H4 bulb can give off light from two different positions. The high beam position and the low beam position. The position of the low beam must stop before the high beam can start so the reflector can do its job.
You claimed that all HID bulbs where made with the light source in the wrong position. The specification I posted shows how to measure a bulb. The picture I posted shows a bulb being measured. The position in the picture matches the position in the specification proving that the light source is in the correct place, proving that your claim is wrong. That is the point.
2. Try several millimetres
Try some evidence. Even the video you posted shows that the lateral movement, if it could be measured, would be less then a 10th of a milimeter. That is not enough to affect alignment.
3. Baffle hole that its too small
Too small for what exactly?
4. The reflector is not "seeing" all of the arc
Again, some evidence would help. Or, at the risk of repeating myself, so?
5. ...its pulling more on hi-beam than a Halogen bulb would be.
Now you are just making shit up. Why don't you measure the resistance of the solinoid on one of the many HID bulbs you have lying about and apply ohms law to determine its current draw. You can even impose worst case weak battery/damaged alternator scenario and calculate draw at 10 volts instead of 12.
6. ...bulb dosent stay perfectly central
Now I am repeating myself. So? Or if you prefer, I refer the honourable gentleman to the reply provided to question 2.
7. ...That's far far less than the advertised 3000hrs
True. That said, they are fitted to a motorbike and not sitting on a test bench. I never got the advertised life out of a traditional bulb either but it is not like a failure is going to leave you stranded since everything is doubled up. That said. I do carry a traditional H4 bulb under the seat when I am going on longer trips.
Now to LEDs.
CREE are a manufacturer, not a bulb type. You would get almost exactly the same results with LED replacements for H4 bulbs from any other manufacturer. The problem is not who makes them, or what type emitter is used, or the position of the LED elements, (which by the way are as 'right' as it can be given the nature of LEDs), it is much simpler than that. As I have mentioned more than once, LED emitters are not point sources. LEDs are surface mounted with the light being emitted perpendicular to the surface. Yes there is a lot of spread, but none of the light can go through the surface so full surround reflectors (the type you get with H4 bulbs etc.) are not a lot of use. The result is clear from the video. The light source emits as much or more light (in Lumens) as traditional H4 bulbs, but the direction it is shining in means the reflectors can not point much of it down the road.
And finally -
The position of the arc bulb within the main glass envelope is almost always incorrect...
No it fucking isn't as I have proven.
The light output from a HID is just to powerful,
Correct. Pity the rest of the sentence is bullshit. You used this argument the last tim eyou tried to knock HIDs and I proved, using MOT documents, that the test is for the pattern which is correct or it isn't. The intensity is neither measured not important.
there is enough freeplay to allow them to wobble and jiggle
I refer the honourable gentleman to the reply provided to question 2.
arc itself which isn't actually fixed
I refer the honourable gentleman to the reply provided to question 2.