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HID: Low, High & Fog
Choosing the Right HID Headlights for Your Vehicle
Most people assume an "HID headlight" is just a brighter bulb you drop into the same socket. It isn't. A real HID system is a bulb, a ballast that fires the arc, and a harness that feeds it clean power, and skipping any one of those three pieces is how people end up with flicker complaints a week after install. Bottom line: pick the HID system that matches your bulb size and your vehicle's electrical behavior, not just the one with the highest lumen number on the box.
What we've learned from testing:
On 2009-2018 Ram trucks, factory auto-headlight and DRL logic can starve an HID ballast of voltage, which is why we build the Morimoto MOPAR relay harness into kits for that range by default. The 2015 model year needs it no matter what, and 2016-2018 trucks need it as well in most configurations we've tested. Skip the harness on the wrong year and the symptom is the same every time: a ballast that flickers or drops out exactly when the truck shifts into auto mode.
Still, electrical behavior is only half the puzzle. After that comes bulb size, because the bulb and adapter have to match your H7, H8, H9, H11, or H16 housing exactly, and a mismatched single-beam bulb in a dual-beam housing just won't seat, even though the ballast itself isn't size specific and will run any bulb type in the lineup. A full HID pair, like the H7 Hylux system built around Morimoto XB HID bulbs, ships as two ballasts, two bulbs, and the wiring to connect them, rated 2,800 to 3,500 lumens at 35 to 55 watts and 4.4A at 12V DC per pair. That is the baseline spec to compare against before you buy anything else labeled HID.
If you're cross-shopping instead of committing to HID, our LED: Low, High & Fog lineup covers the same bulb sizes without a ballast or relay harness in the loop, which is worth a look if your vehicle already has flicker-prone PWM wiring from the factory.
Know your bulb size before you buy. H7, H8, H9, H11, and H16 all look similar but are not interchangeable, and OEM part numbers on your current bulb or housing are the fastest way to confirm fitment before checkout.
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