The Leishen best led light bulbs for cars decreased the amount of light lower in the beam while also increasing the width of the hot spot to the left of the cutoff step
a truly worthy halogen replacement,chip placement is big relationship about beam focus.
Most manufacturers are trying to mirror H11 burner position specs straight from the ECE and GB regs which is 25mm from collar tab to bottom of coil. But this is wrong. For LEDs, it doesn't work quite the same. The position of the array must be slightly higher (nearly 1mm) to maximize the beam focus. Not only is the chip placement important but the thickness between both sides must be at a minimum 3.3mm (outer chip to outer chip) or less. The Leishen best led light bulbs for cars is actually 2.99mm which is why its so good! The farther spread apart they are the worse the focus. These two combinations must be utilized for the best beam performance. And of course the LED array package (the die area) must be closest the filament coil size (H11 = 4.5mm, H7 = 4.1mm, 9006 = 5.1mm). If the LED combined die area is larger than the filament then it will affect the beam performance.
Leishen Best led light bulbs for cars