Shop LED headlight bulbs from our house brand Alpha Series Lighting, plus Morimoto and GTR Lighting. Choose the bulb base for your low beam, high beam or fog-light application, then check the exact vehicle and housing requirements. Compare package quantity, cooling clearance and any required adapters on each product.
Comparing Diode Dynamics bulbs? Read our SL2 vs SL2 Pro comparison guide for cooling, colour and application checks.
Considering GTR Lighting? Start with the GTR Ultra 3 H11 LED bulbs. This exact white-bulb model supports H11, H8 and H9 bases. Its US public-road headlight restriction still applies; a matching base does not establish permitted use.
For another H11 option, compare the Morimoto 2Stroke 4.0 H11 pair. Compare the exact installation requirements with the GTR listing rather than choosing by a claimed lumen figure alone. For Diode Dynamics, our SL2 vs SL2 Pro comparison explains the fanless and fan-cooled designs and links to the matching H11-family pairs.
Prefer Alpha Series? Check the Alpha Series H11 listing for current availability and application details.
Identify the vehicle, year, exact headlight assembly and the function being replaced: low beam, high beam or fog light. Use the OEM bulb guide for original equipment and check the existing bulb marking. An aftermarket headlight housing may use a different bulb from the original unit.
Start with the required bulb base, then compare the matching Alpha Series product. For example, Alpha Series H11 bulbs and Alpha Series 9005 bulbs are separate selections. Check the product’s application, cooling clearance, connector and package quantity before ordering.
The base is one check. Also compare the space behind the housing, dust-cap clearance, retaining mechanism, connector and any adapter requirements. Follow the exact product’s installation instructions for the housing you are using.
An OEM guide describes the original headlight arrangement. A replacement housing can change the required bulb. Our 2008–2017 Cascadia OEM bulb guide keeps the OEM lookup first and provides separate, optional notes for named United Pacific housings.
Choose the bulb specified for each position. Some vehicles share a base across positions, while others use separate bases or a combined high/low bulb. A matching connector alone does not confirm the bulb is suitable for every lighting function.
Requirements vary by vehicle, housing and LED bulb. Check the exact application notes for adapters, retaining clips and electronic modules. Do not assume an accessory is included or required simply because another bulb with the same base uses it.
Package quantity varies by listing. Read the included-parts section and the selected option before ordering, especially when replacing both sides or buying a single spare. The category contains different brands and package formats.
Compare specifications for the exact bulb model and check whether an output figure is per bulb or per pair. A category-wide lumen or lifespan figure does not describe every product. Housing compatibility, the installed beam pattern and correct adjustment also matter when choosing a bulb.
Begin with the bulb currently specified for the headlight or fog-light assembly. Keep low-beam, high-beam and fog-light requirements separate, and identify an aftermarket housing before using an OEM vehicle lookup.
Compare our Alpha Series H11 bulbs and Alpha Series 9005 bulbs when those bases match your application. Review the exact product’s dimensions and connector requirements, then compare the available Morimoto and GTR Lighting alternatives.
For a specific big-rig example, use the 2008–2017 Cascadia OEM bulb guide and its separate notes for named replacement housings.
