If you look at your headlamp housing you will note that all direct light from the bulb itself is physically shielded and does not project forward. Light is captured and focused by the reflector. As long as the light from the led is produced even approximately within the same physical area as a normal h13 incandescent lamp, the beam of light produced by your headlamps will be virtually identical.
Again - show me the science.
The science is in your assumption that getting it approximately right is good enough. Sounds like you missed some science classes because approximately doesn't cut it. The reflector is designed to capture and reflect a specific type of light, the light from an incandescent bulb. That is science clown, not just getting it "close enough".LOL
---------- Post added at 07:50 AM ---------- Previous post was at 07:43 AM ----------
If you look at your headlamp housing you will note that all direct light from the bulb itself is physically shielded and does not project forward. Light is captured and focused by the reflector. As long as the light from the led is produced even approximately within the same physical area as a normal h13 incandescent lamp, the beam of light produced by your headlamps will be virtually identical.
Again - show me the science.
Your assumption that getting it approximately right is good enough doesn't sound like science to me... Sounds like you missed some science classes because approximately doesn't cut it. The reflector is designed to capture and reflect a specific type of light, the light from an incandescent bulb. That is science clown, not just getting it "close enough".LOL
If you are such an expert you should already know better. The light emitted from the led is very different than the light emitted from the incandescent bulb. I would think that an expert would already know this. Why do you think they try so hard to mimic the light source position and direction by placing several leds in the bulb? It is a band aid attempt at making them work where they do not belong.
Fit some to your truck and then take them out and compare them with a factory designed system, oh wait, there is no comparison because manufacturers spend millions to get this right. You can't do that in your garage no matter how many bad led bulbs you try first.