{ "id": "h4-halogen-headlight-bulbs", "sku": "h4-halogen-headlight-bulbs", "title": "H4 Halogen Headlight Bulbs (2 Pack)", "slug": "h4-halogen-headlight-bulbs", "price": 29.69, "currency": "CAD", "availability": "in_stock", "purchasable": true, "category": "headlights", "category_label": "Headlights", "tags": [], "colors": [], "materials": [], "dimensions": null, "weight": null, "images": [ "https://myautoshop.online/dropship-images/headlights/h4-halogen-headlight-bulbs/main-h4-halogen-headlight-bulbs.jpg" ], "description_short": "Two H4 fitting bulbs with a 3800 Kelvin light colour, supplied as a pair so both sides are replaced together and look the same from the front.", "description": "The problem with waiting until a bulb dies\n\nHeadlight bulbs rarely fail at a convenient moment. They go on a wet evening, on an unlit road, halfway through a long drive. One side drops out, the beam pattern goes lopsided, and the half of the road that used to be lit suddenly is not. Driving like that is uncomfortable and it gets you unwanted attention.\n\nThe other version of the problem is slower and sneakier. Halogen bulbs dim as they age. The change happens over months, so your eyes adjust along with it and you never notice how much light you have lost. Then you fit a fresh pair and realise the road has been getting dimmer for two winters.\n\nA pair of H4 halogen headlight bulbs solves both versions of that problem. One pack covers both sides, which means matched light output rather than one bright side and one tired one. And if you only need one bulb today, the second one lives in the glovebox until it is needed.\n\nWhat H4 actually means\n\nH4 describes the base of the bulb, not the vehicle it goes in. It is a three contact fitting with locating tabs that only seat one way, and it carries two filaments inside a single glass envelope. One filament handles dipped beam, the other handles main beam. That is why vehicles with one headlight unit per side so often use this type.\n\nYou will also see the same fitting printed as 9003 or HB2. Different markets, different habits, same physical base. If the bulb you pull out of your headlight carries any of those three codes, this pack matches it.\n\nWhat H4 does not tell you is anything about the vehicle. We list fitment by bulb type only, so the job for you is a quick check. The owner manual usually has a bulb table in the maintenance section. Failing that, remove the old bulb and read the base. Two minutes of checking beats a return.\n\nReading the colour number\n\nThe colour temperature here is 3800 Kelvin. That number describes the tone of the light, not how much of it there is, and the two often get confused in product listings.\n\nLower Kelvin numbers look warmer and more yellow. Higher numbers look cooler and eventually blue. At 3800K you are in clean halogen white, with just enough warmth that it does not read as blue from outside the car. Plenty of drivers prefer that. A very cool light can scatter off rain and fog and bounce back at you, which makes a wet night harder rather than easier.\n\nThere is also the look of the thing. A white halogen headlight bulb at this colour sits close to what most vehicles left the factory with, so the front end stays tidy. If you want a bulb that announces itself, this is not it. If you want light that looks right and behaves predictably, it is a reasonable choice.\n\nWho these suit\n\nAnyone running an H4 housing who wants a straightforward replacement. That covers a lot of ground. Plenty of cars, vans, light trucks and single headlight motorcycles use this base. People searching for a motorcycle h4 bulb and people searching for a van replacement headlamp bulb often end up looking at the same fitting.\n\nThey also suit people who like to be prepared. Keeping a spare pair in the vehicle is one of the cheaper bits of insurance available to a driver. A blown bulb becomes a ten minute job in a car park instead of an unplanned workshop visit.\n\nWho they do not suit is anyone who needs a specific approval marking on the bulb. We do not claim one for this product. If that marking matters where you drive, check what is printed on your existing bulb and ask us before you order. We would rather have that conversation first.\n\nChoosing between one bulb and a pair\n\nYou can buy single bulbs. We sell these as a pair because of how headlight bulbs age. Both sides have been switched on and off the same number of times and have seen the same vibration, so when one fails the other is usually close behind.\n\nThere is a visual reason too. A new bulb next to an older one often shows a difference in tone and reach. From the driver's seat the road looks uneven. From outside, one side looks crisper than the other. Fitting a matched h4 halogen bulb pair avoids all of that.\n\nIf you genuinely only want to change one, do it and store the spare properly. Leave it boxed, keep it dry, and keep it somewhere it will not get knocked around.\n\nFitting without ruining the bulb\n\nThe swap itself is usually simple. Open the bonnet, find the back of the headlight, and remove whatever cover sits over it. Some vehicles have a rubber boot, some have a plastic cap that twists off, and some hide the bulb behind an air intake or a washer bottle that needs shifting first. A screwdriver is sometimes useful. Often no tools are needed at all.\n\nUnplug the connector, release the retaining clip or twist the bulb free depending on the design, and pull the old bulb out. The new one goes in the same way, with the locating tabs lined up with their slots. Seat it fully, close the clip, plug the connector back on, then test both dipped and main beam before you put the covers back.\n\nTwo rules matter more than the rest. First, let the headlight cool before you touch anything. Halogen bulbs run very hot and so does the housing around them, and a bulb that has just been running will burn you. Second, do not touch the glass with bare fingers. Skin oil leaves a residue that creates a hot spot once the bulb heats up, which can shorten its life. Hold the metal base, or keep the protective sleeve on until the bulb is seated. If you do touch the glass, wipe it with rubbing alcohol on a lint free cloth before fitting.\n\nLooking after them once they are in\n\nThere is not much maintenance to a headlight bulb, but there are a couple of habits worth keeping.\n\nClean the lens. A soft damp cloth on the outside, and a quick wipe of the dust cover while you have it off, makes a difference.\n\nCheck your spare now and then. If it has been rolling loose in a door pocket for a year, the glass may be marked or the base may be bent. A boxed bulb stays usable far longer than a loose one.\n\nAnd keep an eye on the pair. If one side starts looking dimmer or shifts colour slightly, that is the warning. Order a replacement before it goes rather than after.\n\nThe short version\n\nThis is a two pack of H4 halogen headlight bulbs with a 3800 Kelvin light colour. The H4 base is also printed as 9003 or HB2, and it handles both high and low beam from a single bulb. There is no ballast, no driver and no wiring to add, because halogen bulbs run straight off the existing headlight circuit.\n\nCheck the fitting in your owner manual or on the old bulb before you order. Let the housing cool before you start. Keep your fingers off the glass. Fit both sides so the light matches, or fit one and keep the other as a spare. That is genuinely the whole job.", "llm_summary": "The H4 Halogen Headlight Bulbs (2 Pack) product is a pack of two H4 halogen headlight bulbs. The H4 fitting is also listed as 9003 or HB2 on some bulbs, and it combines high and low beam filaments in a single bulb. Stated colour temperature is 3800 Kelvin, giving a clear halogen white light. The bulbs are new, supplied two per pack, and replace an existing H4 bulb in an existing headlight housing without adapters or extra wiring. Buyers should confirm the fitting in the owner manual or on the old bulb before ordering, avoid touching the glass with bare fingers, and allow the housing to cool before changing a bulb.", "returnable": true, "return_policy": "Change-of-mind returns accepted for 15 days from purchase under this shop's own published policy: original packaging, proof of purchase, buyer pays return postage. Faulty or misdescribed goods are repaired, replaced or refunded with return postage covered by the shop, and rights under the consumer protection law of the customer's province or territory are unaffected.", "shipping_profile": "standard", "warranty": null, "brand": "Online Auto Company", "gtin": null, "mpn": null, "condition": "new", "url": "https://myautoshop.online/h4-halogen-headlight-bulbs/", "canonical_url": "https://myautoshop.online/h4-halogen-headlight-bulbs/", "json_url": "https://myautoshop.online/api/products/h4-halogen-headlight-bulbs.json", "updated_at": "2026-11-11", "compare_at_price": 35.63 }