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post #11 of 56 (permalink) Old 01-17-2020, 11:07 AM
J83
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Originally Posted by chipjumper View Post
Whatever you do, buy a purpose-built headlight assembly (morimoto, etc) versus a LED bulb assembly. I’m not sure what vintage truck you have but if it doesn’t have projectors or LED from the factory, installing LED bulb assemblies are outright dangerous. They blind the hell out of oncoming traffic. The factory headlights are specially designed for halogen bulb assemblies and NOT the LED light dispersal. It’s illegal too (headlight assembly is no longer in DOT compliance) but I have yet to hear about enforcement.


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The danger comes from using a bulb with a non OEM focal point. If the light source is at the same position in the housing as the factory bulb then the reflector housing will work as designed by the manufacture with higher light output. It is when you put a bulb with a shorter or longer focal point in the housing that light begins to go places it was not intended to because it is hitting different parts of the reflector at different angles then designed.

so something like this (assuming they got the focal distance right) would be safe to use since the LED cobs are close together so the light comes from a single source and will scatter less.




where as something like this is likely to run people off the road. In this case the focal point is basically the entire bulb, so there is no singular point for the light to come from and you will get light rays coming off it at all angles from all positions. This is when you get scatter.




This is basically what the cross section of a headlight looks like with the lines put in to show the path of light from the focal point. Were you to move that focal point the light would begin to leave the housing at angles that are less parallel to the road.



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Last edited by J83; 01-17-2020 at 11:11 AM.
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post #12 of 56 (permalink) Old 01-17-2020, 11:39 AM
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Those first bulbs look like Supernova V.4 and those tested very well. On Headlight Revolution YouTube page they show those bulbs in headlight housings and the beam pattern was very good. I am thinking about putting them in my 2003 GMC.

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post #13 of 56 (permalink) Old 01-17-2020, 12:54 PM
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Diode Dynamics is easily one of the best in the business when it comes to automotive LEDs. As far as I know they are the only company that makes an LED specifically designed for reflector housings by maintaining the same focal point as the factory incandescent bulb. That is the only LED I would recommend for use in a reflector housing.

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post #14 of 56 (permalink) Old 01-17-2020, 02:00 PM
 
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Originally Posted by ShopSpecialties View Post
Those first bulbs look like Supernova V.4 and those tested very well. On Headlight Revolution YouTube page they show those bulbs in headlight housings and the beam pattern was very good. I am thinking about putting them in my 2003 GMC.
I agree and highly recommend checking out Headlight Revolution before buying any bulbs. I just put the S-V.4 in my 2005. Beam pattern is spot on, output is excellent, color is crisp and clean. I did have to cut and notch the headlight support to clear the heat sinks.

I had the Opt7 in there for both low and high. Low beam gave out after only 14 months (fan still worked but had the epileptic light show going on)...never touching them again.
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post #15 of 56 (permalink) Old 01-17-2020, 02:56 PM
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I just ordered some of these for my fogs and low beam projectors on my 2019. I guess weíll see if theyíre any good or not!
Which model sealight? I bought the scoparc ones, $70 a pair
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post #16 of 56 (permalink) Old 01-17-2020, 04:37 PM
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Diode Dynamics is easily one of the best in the business when it comes to automotive LEDs. As far as I know they are the only company that makes an LED specifically designed for reflector housings by maintaining the same focal point as the factory incandescent bulb. That is the only LED I would recommend for use in a reflector housing.
They are still not legal to use. Get a real jerk LEO and you can get towed worst case. No different than using non DOT approved tires.
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post #17 of 56 (permalink) Old 01-17-2020, 07:53 PM
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I agree and highly recommend checking out Headlight Revolution before buying any bulbs. I just put the S-V.4 in my 2005. Beam pattern is spot on, output is excellent, color is crisp and clean. I did have to cut and notch the headlight support to clear the heat sinks.

I had the Opt7 in there for both low and high. Low beam gave out after only 14 months (fan still worked but had the epileptic light show going on)...never touching them again.
That is good to hear about the V.4 bulbs. Do you think the videos and testing done by Headlight Revolution give an accurate representation of how the bulbs perform ?

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post #18 of 56 (permalink) Old 01-17-2020, 07:56 PM
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Some departments have purpose built inspection equipment that determines angle and output. Itís not just the LED folks either, itís the HIR and HID folks too that slap these aftermarket lights into legacy headlight assemblies. The Morimoto projectors arenít that expensive BUT the labor seems ridiculous to convert an assembly.

New DOT approved assemblies must be quite expensive. LED plow lights from boss are $700 a pair!!!!


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post #19 of 56 (permalink) Old 01-17-2020, 08:18 PM
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Diode Dynamics is easily one of the best in the business when it comes to automotive LEDs. As far as I know they are the only company that makes an LED specifically designed for reflector housings by maintaining the same focal point as the factory incandescent bulb. That is the only LED I would recommend for use in a reflector housing.
Diode Dynamics tested very well and I would say they are a top 5 bulb. You should check out these new Ultra Series 2 bulbs from GTR Lighting which I think might be the best LED on the market.

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post #20 of 56 (permalink) Old 01-18-2020, 05:37 AM
 
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That is good to hear about the V.4 bulbs. Do you think the videos and testing done by Headlight Revolution give an accurate representation of how the bulbs perform ?
I do think they are representing the bulbs for what they are, good or bad. If they are comparing as described in the videos (using the same housing, power source, distance measured for lux, etc.) and just changing out bulbs to find the differences, then yes. They do mention that not all the bulbs work the same in different headlight housings.

On a side note for being legal, even if something is stamped "DOT" it is up to the LEO to make the call. In PA you can technically fail a safety inspection for any equipment in your vehicle that was not installed by the manufacturer, except in-kind items. Most will just let it slide unless it is a major infraction, such as 4" of tread sticking out past the fenders.
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